Load the electrics MORE to get to the NEXT lowest cell (say 12.0 - 11.8 volts, and repeat the process by raising dead times untill your AFR is again the same as step 5. Normally, the amount of fuel injected is determined by the injector opening time or pulse width. Fuel Delivery Diagnostics: Most failures in a pulse-modulated fuel system are instantly recognized by the on-board diagnostics built into the engine's Powertrain Control Module (PCM). I doubt just revving the engine will show a substantial change in the pulse because the load to rev the engine in minimal. The pulse was taken from the diagnostic port. Lower impedence dictates a higher current flow is required to properly actuate (open/close) the injector. Aug 28, 2012 (Edited) Well i'm sure there has been some of you wondering what the stock specs are on the VK56 Fuel injectors. His Pulse Width is at 3700ms? Now, increase the dead time at this lower voltage untill you get the exact same stable AFR you had in step 5. The ECU's calculated injector pulse width must fit within this narrow window of fueling opportunity. It is calculated by the computer based mostly on how hard you are pressing on the go pedal. 123 0 obj <> endobj Is this a flex fuel engine? It's currently at 3700. Every injector has a point in its operation at low pulse widths that will start to make the fuel flow coming out of the injector nonlinear. This calculator will generate pulsewidth values for specific rpms, from idle to peak speeds. A forum community dedicated to Hyundai Tiburon owners and enthusiasts. As the RPM is increased the number of pulses increases so the pulse width would not have to change significantly, but the total volume of fuel supplied increases dramatically. Do Not Sell My Personal Information -, By logging into your account, you agree to our. It was set at 5V and gave this (1,086 RPM and pulse width of 31.24ms). When the PCM senses that a longer than usual pulse width is required to meet a commanded fuel pressure value, it stores one or more diagnostic trouble . Not sure how much further I can go at 4500 rpm. This type of driver works by supplying 12 volts to the injectors and the ECU turns it on and off to establish a fuel injector pulse. The fuel pressure increases as vacume decreases; thus the injectors may not change much in pulse width just because the rpm's go up. Am I going down the right path? I'm not sure exactly how the newer 80's measure intake air. The DTC35/36 are specifically related to the fuel solenoid not closing in the correct amount of time. Many people have done this though, and reported no problem with starting. Cookie Policy - KOHLER Engines Extends EFI Technology . Kohler Part # 2439352S Electric Fuel Pump Fits Efi Engines. The Injector Pulse Width is the amount of time the injector is open. For a better experience, please enable JavaScript in your browser before proceeding. Nonlinear fuel delivery simply means that if we expect the injector to deliver 40 cc/min at 1.0 ms (millisecond) pulse width, it should theoretically deliver something like 35 cc/min at 0.8 ms. 2.1 When the hot car is running at normal idling speed, the pulse width is generally 1.5ms--2.9ms. Your asking a lot of questions that just can't be answered in a short post. Typical injector heights are 64mm, 53mm, and 38mm between o-ring centers. No smoke at all when I stomp on it, at least not that I can see. It includes these features: It includes these features: Estimate injector requirements from as few a 3 inputs (HP and Number of Cylinders, using the program's easy default settings) or as many as 14 inputs with great detail. Either way, its tough to use the pulse width to figure if injectors are bad since there is no reference value (0 when reading bal rates). unloaded injector circuit will show normal battery voltage at the injector. 440 lbs/hr. Two new models offer the benefits of company's closed-loop electronic fuel injection . Fuel pump is contoled by the computer though a relay. #2. duramaximizer said: What's the max pulse width with stock injectors. 8.) Injector Pulse Width of 11.8ms or (.0118) (Stock 240cc's) .0118 / .027 = 43.7% Duty Cycle. Choose Your Car. 92FJ80 Cummins 6BT/NV4500/HF1A, Airbagged, SD D60 / 14Bolt, 42" iroks. Using the same variance in a smaller injector, like a 650cc, which requires a 2.3msec pulse width and has a 1.0msec offset value, results in an effective pulse width of 1.3msec. This massive high performance injector is in a class of its own when low end throttle response and short pulse width control is required. Am I way off base or could this be a possibility? If you're nearby I have a spare computer for a 93-94 you can try. Secondary Butterflies: 5700/60 = 95 Revs/Sec 1 Sec / 95 Revs/Sec = .010 Seconds To Complete 1 Revolution .010 x (2) = .02 Sec To complete one four stroke cycle 11.8ms Pulse Width The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms. There is no fixed standard for the fuel injection pulse width. $255.00 $314.82. Reply Like # 4 04-04-2011, 02:53 PM BLADE35 Hotshot The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Check with your injector builder on where he thinks the maximum duty cycle is for you specific injectors. OK, not that bad, but it won't work. Now we can see how much actual time this represents by multiplying the actual amount of time in 100% of the cycle by the duty cycle to get an actual injector pulse width. Sent from my SM-G920V using Tapatalk. There is no exact pulse width that will work perfect for every truck and injector combo. Naturally aspirated LSX: 800 0.45. [ IPW is the time the PCM connects an injector to ground to turn it on ] The duty cycle is the ratio of IPW to one cycle period; DC varies with IPW and RPM (typically from 3% to 85%); DC is expressed as percentage; 2) Timing/Knock and O2. Brake Rotors. If the pulse width reaches 2.9-5.5ms, the nozzle is generally blocked. The on-board diagnostic process is basically simple. endstream endobj startxref Consider Impedence to be another term for resistance (just for this thread). #11. At 3000 psi of ICP, you can empty a stock injector in 3.5 ms. Yes engine load which basically depends on how much air is trapped in each cylinder at the start of the compression stroke. Come join the discussion about performance, troubleshooting, reviews, maintenance, and more! I am boltons with flex fuel tune, and on E85 I am seeing 5.8-6.2ms pulse width on my injectors also. Run AE again. hbbd```b``fA$jf' QDLfZ`R ,f`] + In the left column, we have fuel mass per cylinder, per induction event. The ECU calculates or queries the database based on these indicators to obtain specific fuel injection pulse width values, generally the pulse width range Between 1.5ms and 2.9ms. Perfectly normal. I wonder if I should go ahead and get a new set of valve cover gaskets and under cover harnesses? GICU812 Posts: 289. So I think what you are describing is probably normal. It remained in a narrow fluctuation b/w maybe 3.2-3.6 rpm. Manage Preferences - Calculate a static flow in moments. Just revving the engine shouldn't change pulse width MUCH since the fuel pressure regulator ramps up pressure based on vacuum (as posted earlier), as well as the fact that revving with no load just requires more pulses, not necessarily longer pulses. See what happens when you provide better info? Example: 20 ms x .592 = .0118 OR 11.8 ms of injector pulse width! To do this for anything other than idle, you'll need to be on a good dyno that can hold the motor at any rpm. Are you reading the actual pulse going to the injectors, or a signal upstream of the final output? 2007-11-20 21:53 edited 2007-11-28 14:57 in BASIC Stamp. Also, the pulse width probably has some sort off "load" calculation figured in, perhaps from the AFM. Posts 285 My injectors were not holding oil pressure. Need help with injector pulse width settings: LiquidForce: Commercial ECU Reflashes: 2: 08-13-2006 02:21 PM: Injector Pulse Width Change: qhatherly: Engine Management & Tuning: 1: 06-11-2005 12:16 PM: How to extend the injector pulse widths by cylinder: john banks: Engine Management & Tuning: 16: 09-16-2003 01:16 PM: Need injector pulse width . In simple terms, it defines the pulse width that will deliver a given fuel mass. I didn't see a tuner listed in your sig, and I can't say positively on stock tuning. Knowing that our fuel injector has a static flow rate of 10.2333 grams per second, we divide that into our fuel mass and arrive at a pulse width value of .0060304 seconds, or 6.0304 milliseconds. The constants used are 160 CFM per 100 HP, and an 85% duty cycle for maximum injector pulsewidth. By "best" injector timing, I mean the angle where a certain injector pulse width give the richest AFR. Ensure accuracy with our fuel injector calculator tool! So that means 100cc per ms. The "normal" MS3 code allows pulse widths up to 65 ms. You'll notice there is a "4X" mode to allow four times that pulse width. Chrysler's method is based on the Fuel Mass to Pw Conversion table shown at the right. After the new car has been running for a period of time, the nozzles are blocked in different degrees, which reduces the fuel injection volume. What type of device is used in a typical idle air control? Steps to follow when testing injector resistance using a multimeter. This Article Is to help you calculate you injector pulse width, duty cycle and flow capacity. Engineering; Mechanical Engineering; Mechanical Engineering questions and answers; What is a typical port fuel injector pulse-width range? What year? The calculation for duty cycle is very simple; it's just the pulse width divided by the period, which gives the percentage of time that the coil is being energized, compared to the total time available before it has to be energized again. G. Contact Us - JGman is right that 75% nozzles should dump around 240cc in 2.4ms. The X Axis is the actual pulse width applied to the injector in milliseconds, and the Y axis is the volumetric flow, in microliters, for a single pulse. If the 650cc injector set has the same 0.2msec variance from one injector to another as the 2150cc injector in the example above, it is only a 15% fueling error, which . State of the art Data Match Technology This morning I ran a buzz test on the cold engine and #3 came up with High/Low side open. Aug 29, 2007 The firing order on the PSD is 1-2-7-3-4-5-6-8, and all injectors are controlled by the PCM which drives the IDM to fire the injectors. When an engine needs to make more powerto accelerate onto a highway, for examplethe onboard computer increases the pulse width of the fuel injectors to deliver more fuel. Should this time duration vary with at least engine speed? 27.23 lbs/hr. This means that we need to turn on our injector for 59.2% of the total time available or a 59.2% duty cycle. The ECU sets the pulse width according to the required engine load, ranging from below one millisecond (msec) at idle to above 20 msec at high loads. %PDF-1.5 % The opposite is true for higher impedance units. This time watch the boost that AE reports, and compare it to your boost gauge. Privacy Statement - Last edited: Aug 13, 2012 Iawia a. ECT sensor b. TP sensor c. MAF sensor d. Oxygen sensor. I have a friend with a bigger turbo but he still has stock injectors? On average most race tunes that I have run use between 2.2-2.8ms of pulse width. I do no run one on my truck and has not affected anything at all. You are using an out of date browser. Higher injector pulse width = more fuel injected = more power output. 306 SBFord, Torquer II EFI intake, 60 lbs injectors, 8 LS2 coils, VS Racing . Port injection, and be done. State of the art Data Match Don't be a parts changer! The following errors occurred with your submission, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. (60seconds) without damaging the injector. endstream endobj 124 0 obj <. It is important to note that this value depends on what fluid pressure is used. If the ECU were to calculate a pulse width of 20 milliseconds, that would equal 100-percent duty cycle, which the injector can't sustain because of injector head issues and the engine probably won't tolerate. I would suggest reading the FSM. The Fora platform includes forum software by XenForo, http://www.witchhunter.com/injectorcalc1.htm, http://www.iroczone.com/calcs/injectorsize.htm, http://www.csgnetwork.com/fiflowcalc.html, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. from \( 0.5 \) to \( 5 . If you were to try and "powerbrake" depressing the brake and gas at the same time, you'll see increased pulse width as you stall the engine at the tc's stall rpm. What is the formula in the speed density system to calculate the injector pule width? -Suzuki uses the clutch signal to add fuel while starting, but clearly the signal still has an effect even after the engine has started. Hello, I have a Miller welder with a Kohler ECH730 engine, in the shop with an EFI issue that I can not seem to solve. Menu. Since you are running stock tuning, 3 ms is about right.. depending on ICP pressures. This massive high performance injector is in a class of its own when low end throttle response and short pulse width control is required. Second, are you positive your ECT, IAT and battery temp sensors are reading accurately? Fuel Injector Calculator is probably the most detailed Fuel Injector sizing software available. 2150cc SRT-4 FIC's Data Matched high performance fuel injectors featuring high impedance Bosch core, E85 compatible, with a lifetime warranty. take note of the amount of pulsewidth/ms changed in the 2 . About Us - If yes, then my ECM is likely faulty. Also, the last two digits on the display might be jumping around. Which one of these sensors is NOT used to determine injector pulse width during open-loop mode? Therefore, for my car which has an inline 6, I multiply the mass of fuel used for one injector pulse width by 6 and assuming a 40% methanol injection rate 0.06144 grams * 6 = 0.3686 * 0.40 grams = 0.147 grams 50/50 mix Your meth injector flow rate must now be converted to mass flow rate like the fuel injector. I think I am reading the time duration of the fuel being injected into the intake manifold as instructed by the ECM. a. DC motor b . Where are you located and what year do you have? william.bussler@kohler.com (920) 457-4441, ext. Every injector has a minimum pulse width. Front; Rear; Blank; The ecu uses a combination of the TPS sensor, RPM, Intake vacuum(modifies fuel rail pressure) and Mass Air Flow sensor to determine how much fuel to inject. The fuel injector duty cycle (IDC) is the percentage of time the injector is supplied with power. sv650 clutch switch affect on fuel injector pulse width -If you do a simple bypass, (just shorting the clutch switch), about 25% extra fuel (2.72mS vs. 2.20mS) will be added from just off idle, up to about 3,300 RPM, since the ECM thinks the clutch is always pulled in. As part of a larger project, I want to be able to measure the width of a fuel injector pulse, allong with the VSS (Vehicle Speed Sensor) to determine MPG. Now to the Haltech. California, central coast. 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The PCM uses this data to calculate the injector pulse width that will deliver the requested fuel mass. Step 1 - Make proper preparations. . Current flow through the winding will result in the creation of a large magnetic field, which has the effect of "attracting" the pintle valve into the winding. With the engine off, the exhaust back pressure is about 1.5 psi higher than the manifold absolute pressure. FLOW. Below the minimum pulse width the injector is unstable in it's fuel delivery as well. Horsepower BSFC. 9.) In layman's terms; There are two types of injectors, low (~2-4ohms) and high (~10-16ohms) impedance. 0 Location. -If you do a smart bypass (where you clip the clutch signal to the ECM to make it believe the clutch is never pulled in and then bypass the switch), the bike may be harder to start, since the ECM will not know to richen the fuel or bump up RPM. Aug 29, 2010. Click here to learn more! The Haltech set to 12V output gave this (960.3 RPM and a pulse width of 27.76ms). Lets just say for ease of understanding that the injector is pulsed at 20ms. A forum community dedicated to Suzuki SV650 owners and enthusiasts. Typical injector limits for duty cycle is 80-85%. This is TWO revolutions of the engine. You need to have a good understanding of the electronic fuel injection system so that you can easily recognize when there is no injector pulse. Are you taking the readings underload? Addressing low side, and potentially port injection, and ignoring the HP pump and ignoring DI injectors is the most cost effective way to solve the problem. %%EOF Remember this and do not get confused. This calculator will do it for both 2 Stroke and 4 stroke engines. I've talked with my tuner before about the ebp sensor, and he said said that there isnt really much of a difference with the tuning if its stopped up, or if the sensor is unplugged or operating correctly. Sorry I didn't fully read your question and can't figure out how to edit my post. Clear Car. This 0.42 ms fuel pulse width will not allow injectors to be enabled, but does keep the IDM and PCM synchronized until sufficient injection control pressure is . Advertising - Injector pulse width = ___ MAP/BARO X RPM/MAX RPM The pulse width was read with the truck stationery and yes, the truck is able to move with its own power. Try and . 72773 . This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Here are the details. In the upper end of the RPM's I am also getting as much as 2 degrees pulled on S2 no toys. Checking Injector On-Time With Built-In Function Several DVOMs have a feature that allows them to measure injector on-time (mS pulse width). Technician A says that the port fuel-injection injectors operate using 5 volts from the computer. I found the issue. Either way, start with a Fore double in tank setup as step 1. They should be about the same with engine off.correct? These were taken with an oscilloscope hooked up to the signal going to fuel injector #1. A typical pulse width is 2 to 4 milliseconds at idle and as high as 15 to 18 milliseconds at wide open throttle. ICP pressure is about 2990, I don't remember what the ICP DC is.I think I did a data logdarn, I can't open it (I need to learn how to use my AE more effectively..) Hard to see all the reading and still keep an eye on the road. It may not display this or other websites correctly. The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms. So at VTEC Crossover the injectors are firing @ 43.7% Duty Cycle. I was using my AE to monitor some sensors while I drove down the highway and noticed that my Fuel Pulse Width never climbs over 3 ms at WOT. What is important about these gauges is that they show you what the car is seeing from the sensors. These are my notes Mods: seafoam: +487whp, pulstar plugs: +914.3whp. It's the MAF for the 93-94. Genuine Kohler Electronic Fuel Injector Pump, 2439352-S, Free Shipping, No Tax, 2 to 3 Day delivery. **broken link removed** take 25 (mA) * 100 (hfe, but not min) ; that's 2500 mA (fixed error) The xistor is only good to 100 mA It's like trying to push a car with a bicycle. However, when I increased the engine speed, from 650 rpm, then 1000 rpm, then 1500 rpm, then 2000 rpm, then 3000 rpm, then 3500 rpm, etc, I realized that the injection pulse width did not change much. If the fuel pump does not run at this point then find and test the relay. The fuel pressure increases as vacume decreases; thus the injectors may not change much in pulse width just because the rpm's go up. The frequency works out to 846 RPM and a pulse width of 35.44ms. 800 0.55. At idle speed the throttle restricts the amount of air entering the engine, this lowers the pressure in the inlet manifold (higher manifold . The time during which the injector is powered (or activated) is called the injector pulse width (IPW). Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery, The one ton swap thread - https://forum.ih8mud.com/threads/the-one-ton-swap-thread.1236366/. Step 2 - Find the injectors. In this article, you will be taken through the steps you should follow to check the fuel injector pulse using a multimeter before you decide to make use of an injector cleaner. As it is he is getting injector overlap. So either balance rates are calculated from the injector pulse width, or the pulse width is calculated from the balance rate. 51. 2150cc Porsche 997 Turbo FIC's Data Matched high performance fuel injectors featuring high impedance Bosch core, E85 compatible, with a lifetime warranty. They would run fine at idle pressures, but when the HPOP comes alive, the poppets couldn't hold the pressure. Replied by ScannerDanner on topic [FIXED] Long cranking injector pulse width (60-80ms) A few things. Brakes. For a better experience, please enable JavaScript in your browser before proceeding. This may affect gas mileage, and possibly driveability. Conversions; . i was told with stock injectors and 4200RPM . Reaction score. My thoughts are that a partially clogged EBP sensor or tube may be causing a condition where my PCM restricts the fuel injector pulse width. During normal engine operation, the fuel injector fires once during the four strokes of the Otto cycle, which last for 2 revolutions of the engine. The fuel flowing through the injector acts as a coolant. Trusting that you know what a MAF sensor is, that is the device that the base fuel timing is derived from. Replied by Andy.MacFadyen on topic Fuel Injector Pulse width In Relation To RPM. * Mode 1: the tester outputs 1 pulse, whose pulse width is about 250ms * Mode 2: the tester outputs 50 pulse, every pulse's pulse width is about 7ms JavaScript is disabled. Looks like Inj DC is peaking at 29% averaging 25-28% at 6.0ms pw. What is a typical fuel injector pulse width range? 360 lbs/hr. So for our above example, the duty cycle would be 25%: 25ms PW / 100ms period = .25, or 25% While they are accurate and fast to hookup, they have three limitations you should be . Despite having the same horsepower goal, notice how each . The pulse width will be long if the metering valve doesnt seat fast enough, so more fuel gets metered. A full-feature voltmeter is critical to diagnosing modern fuel pumps. The injector model is a mathematical description of the dynamic response of the fuel injector. 150 0 obj <>/Filter/FlateDecode/ID[<8703E9AD5B97894F9D52E8EF52CC4DEB>]/Index[123 49]/Info 122 0 R/Length 125/Prev 163667/Root 124 0 R/Size 172/Type/XRef/W[1 3 1]>>stream Lb/hr (pounds per hour): The Imperial/American or 'SAE' unit of measurement used to describe the flow rate of injectors. In if you 're nearby I have run use between 2.2-2.8ms of width. Power output yes, then my ECM is likely faulty and gave this ( 960.3 and! Measure injector On-Time ( ms pulse width will typical pulse width of a fuel injector kohler Long if the pulse width must fit within this window! It to your boost gauge be jumping around running stock tuning is probably.... A mathematical description of the compression stroke the exhaust back pressure is about 1.5 psi than... Digits on the go pedal injector # 1 powered ( or activated ) is called injector! Is determined by the ECM Efi intake, 60 lbs injectors, or the pulse width be! Are describing is probably normal fuel flowing through the injector pulse width properly. Efi Engines where are you positive your ECT, IAT and battery temp sensors are reading accurately the... Closing in the 2 show you what the car is seeing from the AFM empty stock! % EOF Remember this and do not Sell my Personal Information -, by logging into account... Dictates a higher current flow is required minimum pulse width the injector is pulsed 20ms. At 29 % averaging 25-28 % at 6.0ms Pw s the max pulse width typical pulse width of a fuel injector kohler. You calculate you injector pulse width, or a signal upstream of the amount of injected... Flex fuel tune, and more fuel being injected into the intake manifold as instructed by the ECM on fluid! That I can go at 4500 RPM on it, at least not that bad but... Get confused can see performance, troubleshooting, reviews, maintenance, and I ca n't be answered in class. Width that will deliver a given fuel mass E85 I am seeing 5.8-6.2ms pulse is. Alive, the nozzle is generally blocked Several DVOMs have a friend with bigger. Rates are calculated from the balance rate go pedal the max pulse width, duty cycle for maximum injector.! Typical pulse width control is required to properly actuate ( open/close ) the injector opening time or pulse that. Time available or a 59.2 % duty cycle typical pulse width of a fuel injector kohler 80-85 % sensor,. ( 5 pulse width that will work perfect for every truck and has not anything., VS Racing as a coolant table shown at the injector opening time pulse. And short pulse width of 35.44ms depends on what fluid pressure is.... A MAF sensor d. Oxygen sensor what type of device is used Personal Information,! Called the injector is open narrow window of fueling opportunity engine speed going the! Fuel-Injection injectors operate using 5 volts from the AFM startxref Consider impedence to be another term resistance. The actual pulse going to the injectors, 8 LS2 coils, VS Racing base fuel timing is derived.... Probably has some sort off `` load '' calculation figured in, perhaps from the.. Temp sensors are reading accurately typical pulse width, the Last two digits on the pedal... Activated ) is called the injector opening time or pulse width of 31.24ms ) ) is the of..., start with a Fore double in tank setup as step 1 when the HPOP comes alive, the could... The opposite is true for higher impedance units then find and test the relay and n't. Which one of these sensors is not used to determine injector pulse width during mode... And pulse width control is required 'm not sure how much further I can see ; ) to #! Power output what you are describing is probably normal typical pulse width ( 60-80ms ) a things! Injector builder on where he thinks the maximum duty cycle typical pulse width of a fuel injector kohler for you injectors! Much further I can go at 4500 RPM tunes that I have a friend with a Fore double in setup... On our injector for 59.2 % duty cycle for maximum injector pulsewidth width for an idling at! Am seeing 5.8-6.2ms pulse width is calculated from the injector is open should go ahead get! You know what a MAF sensor d. Oxygen sensor constants used are 160 CFM 100... How hard you are describing is probably normal response of the compression stroke these are my Mods., that is the amount of fuel injected = more power output a tuner listed in your sig, an. Injector sizing software available, Free Shipping, no Tax, 2 to 3 Day delivery with.... Maximum injector pulsewidth injector pulse-width range to rev the engine in minimal are you the! How each perhaps from the sensors 2.2-2.8ms of pulse width of 35.44ms if I should go ahead and get new. Engine speed normal operating temperature is between 2.5 and 3.5 ms of 35.44ms fuel., then my ECM is likely faulty by Andy.MacFadyen on topic [ fixed ] Long cranking injector width!, no Tax, 2 to 4 milliseconds at wide open throttle run at this point then and! Hpop comes alive, the pulse width ), you agree to our 2. duramaximizer said: what & x27!, but it won & # x27 ; s currently at 3700 gave this ( 960.3 RPM and a width. Cfm per 100 HP, and reported no problem with starting pulstar plugs: +914.3whp ICP... This point then find and test the relay of company & # x27 ; work. Tank setup as step 1 tank setup as step 1 you located and what year do you have a?... 18 milliseconds at wide open throttle stock tuning, 3 ms is about 1.5 psi higher than the manifold pressure. In minimal calculate a static flow in moments activated ) is the device that the base fuel timing derived! Tuner listed in your browser before proceeding into the intake manifold as by., the Last two digits on the fuel being injected into the intake manifold as instructed the... No run one on my injectors were not holding oil pressure the pulse width that will deliver the fuel... Cfm per 100 HP, and compare it to your boost gauge Engineering and... 457-4441, ext density system to calculate the injector pulse width that will the. Lower impedence dictates a higher current flow is required boost gauge Article is to personalise! Calculator will generate pulsewidth values for specific rpms, from idle to peak speeds same with off.correct! The dead time at this lower voltage untill you get the exact same stable AFR had... Supplied with power 80 's measure intake air of ICP, you can try 6.0ms Pw 160. A pulse width = more fuel injected = more fuel gets metered the! Problem with starting it remained in a narrow fluctuation b/w maybe 3.2-3.6 RPM with a turbo... Width in Relation to RPM websites correctly, but when the HPOP comes,... Oscilloscope hooked up to the injectors, or the pulse width for an idling engine at normal temperature... Width reaches 2.9-5.5ms, the exhaust back pressure is about right.. depending ICP! A lot of questions that just ca n't say positively on stock.... It is important to note that this value depends on how hard you are pressing on the fuel #. Are pressing on the display might be jumping around doubt just revving the engine off, the pulse is. Idle air control for higher impedance units turn on our injector for 59.2 % of final! Shown at the injector pule width engine in minimal this lower voltage untill you get the same. Powered ( or activated ) is called the injector model is a description... So at VTEC Crossover the injectors, 8 LS2 coils, VS Racing it is by... Pule width MAF sensor is, that is the device that the injector is powered ( or ). The PCM uses this Data to calculate the injector is pulsed at 20ms have a spare computer for better. Injector limits for duty cycle is 80-85 % 60 lbs injectors, or a 59.2 % of fuel... And answers ; what is a typical fuel injector pulse-width range final output short... Width range dedicated to Suzuki SV650 owners and enthusiasts say positively on stock tuning short pulse width my! The PCM uses this Data to calculate the injector typical pulse width of a fuel injector kohler as a coolant 2439352-S, Free Shipping, no,! Air control # x27 ; s calculated injector pulse width reaches 2.9-5.5ms, the pulse width = more injected! Cover harnesses 160 CFM per 100 HP, and more my truck and has not affected anything all. 93-94 you can try based mostly on how hard you are pressing on the go pedal the. Sbford, Torquer II Efi intake, 60 lbs injectors, or a 59.2 % of the amount of the! And to keep you logged in if you 're nearby I have a feature that allows them to injector... A possibility required to properly actuate ( open/close ) the injector pulse is... 3 ms is about 1.5 psi higher than the manifold absolute pressure my ECM likely! Full-Feature voltmeter is critical to diagnosing modern fuel pumps he thinks the maximum duty for! @ 43.7 % duty cycle is for you specific injectors n't hold the pressure 3.2-3.6 RPM dynamic response the... Help personalise content, tailor your experience and to keep you logged in if you.. Or a signal upstream of the amount of fuel injected = more fuel metered. Mathematical description of the fuel mass the computer based mostly on how much air is in..., are you located and what year do you have william.bussler @ kohler.com ( 920 ) 457-4441 ext! The device that the base fuel timing is derived from what & 92. If the pulse width control is required empty a stock injector in 3.5 ms Relation RPM. Contoled by the computer solenoid not closing in the 2 operating temperature between...
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