Question about 2000 Chevrolet Malibu

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Does not output pulses toward the fuel injectors

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Check for a broken wire or check the fuse. look in under hood fuse box, and there should be a diagram of were this fuse is. or tell you where it is.

Posted on Jul 08, 2010

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06 triburon no spark no injector pulse no fuel pump.crank sensor wires were bared and touching together. replaced sensor


Do you know how to test ecu computer circuits ? May have damaged the computer internally . For most make vehicles sold in US you can find free wiring diagrams at http://www.bbbind.com/free_tsb.html Then watch videos like this ECM Inputs and Outputs Diagnosis Also check out videos on wiring diagram reading .

Feb 02, 2017 | Cars & Trucks

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I have no injector impluse


no injector pulse - DodgeForum.com

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94 s10 doesn't seem to be getting fuel what makes injector s pulse?


Injectors pulse when fuel pressure is sensed and the cam possition sensor indactes its time to load the intake stroke with fuel for that cylinder.

Apr 15, 2013 | Cars & Trucks

2 Answers

Turns over but wont start i got fire and fuel to the fuel rail but the injecters are not delivering fuel any ideas whats wronge


sounds like u got no injector pulse comin from ecm.we need to pull ecm codes an review them ,possible camshaft sensors faulty they usually provide reference pulses to ecm for injector firing or pulse.without this pulse ur injectors will never open up to let fuel enter combustion chamber. one way of checking pulse is to connect a noid light(small light bulb that plugs in injector pigtail to chek for power to injector and ur pulsing ground coming from ecm to injector) an test for a blinking light while cranking engine.

Apr 08, 2011 | 1998 Ford F150 Regular Cab

1 Answer

Fuel injector won't allow gas to flow into engine, have spark, have fuel psi. All fuses ok. OBD connection won't connect to reader can't get codes.


    Test fuel injector pulse and supply voltage output (test is used for most cars). This test will tell you if the computer system has operating voltage and injector trigger signal. Remove an electrical connector from a fuel injector (it doesn't matter which injector) probe both sides of the connector with a grounded test light
    (there are only two terminals). Have a helper turn the key to the "on" position without cranking the engine and observe the test light. The test light should illuminate one side of the connector only. Next, switch the test light lead to the positive side of the battery to test the system ground injector trigger, probe the side of the connector that did not light up, have a helper crank the engine over and observe the test light, it should blink on and off. If this test checks ok continue to next step. (Note: if no injector pulse is present try disconnecting the remainder of injectors and re-test, if a fuel injector is shorted it can shut down the injector driver causing no injector pulse. If injector pulse returns plug injectors electrical connectors in one at a time until the pulse fails and replace that injector)

    If this test revealed that there was no pulse but system has power the ECM is not generating a fuel injector trigger. If there is no trigger to the fuel injector it will not allow fuel to enter into the engine. Some of the most popular reasons that can cause this condition include a shorted crankshaft angle sensor, shorted camshaft position sensor or shorted ECM/PCM. (When a system trouble code scan is performed it does not always catch a crankshaft angle sensor, camshaft position sensor failure). Tip: try disconnecting all non-essential sensors, example: oxygen sensor, coolant sensor, throttle position sensor, air intake temperature sensor, mass air flow or map sensor and EGR valve pressure differential sensor. Crank the engine over, if the injector pulse returns, one of the sensors is shorted causing the system to not operate. Plug the sensors in one at a time until the injector pulse fails then replace that sensor and reassemble.
    click on this link directly for more details
    This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

Jan 30, 2010 | 1996 Volkswagen Golf

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Ok i had a p0302 and then i changed plug wires coil packs the icm injectors camshaft sensor and now i can a p0301 code.. and when i clear the code it will come back with the same code or else a p0300.. im...


1. Freeze Powertrain Control Module (PCM) and see if the problem can be duplicated.

2. Wiggle tug test wiring for #2 injector.

3. Scope the #2 injector for a glitch when the misfire happens. 1. Test for the Exhaust Gas Recirculation (EGR)/coolant adapter gasket leaking EGR gases past the gasket.

2. Connect a vacuum pump to the MAP sensor, block the vacuum source, reset fuel trims, start the engine and add typical vacuum to the MAP sensor and check operation.

3. Test the spark output with 2 High Energy Ignition (HEI) testers, at 25 KV air gap each, at the spark plug wires to ground at wires 2 and 3, then 1 and 4 at cranking speed and engine running.

4. Test the fuel injector pulse width at the injectors compared to the scanner data.

5. Disconnect the O2 sensor, reset the fuel trims, test the system operation in open loop, test injector pulse width. Compare to the closed loop operation injector pulse width and engine operation.

6. Test the Powertrain Control Module (PCM) powers and grounds during the problem.

Oct 13, 2009 | 1996 Chevrolet Cavalier

1 Answer

I have fuel pressure past the fuel filter towards the engine, but nothing at the throttle body. I have checked the fuel line to the TBI and it is clear.


HI yes no injector pulse is the same like if you dint have fuel pressure injectors allow measure fuel to go inside engine.

Sep 23, 2009 | 1990 Chevrolet Suburban

1 Answer

1991 suzuki samurai want start


Check ECM (engine computer) located under glove box. Injector circuit output probably dead. Replace ECM. Go to Searchparts.com for best price.

Jun 06, 2008 | 1991 Suzuki Samurai

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