Question about 1995 Pontiac Firebird

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No injecter pulse new engine - 1995 Pontiac Firebird

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Crankshaft position sensor is the likely culprit. Check and verify connection and if good, replace the CKP.

Posted on Sep 01, 2010

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1 Answer

No injection pulse on a 2003saturn vue


The ECM will only pulse the injectors if it is getting all the inputs it requires, therefore check for crank/cam sensor inputs and other major signals.

Apr 28, 2015 | 2003 Saturn VUE

1 Answer

P0372 code


Possible causes


- Timing Reference Optical Sensor harness is open or shorted

- Timing Reference Optical Sensor circuit poor electrical connection

- Faulty Timing Reference Optical Sensor

- Damaged Powertrain Control Module (PCM)


What does this mean?



When is the code detected?


Some high resolution pulses are missing from the optical sensor to the PCM


Possible symptoms


- Engine Light ON (or Service Engine Soon Warning Light)


P0372 Description



The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most important inputs by the PCM for fuel control and timing. This test monitors the number of high resolution pulses which have been missed (not detected). It's based on a comparison between the number of pulses that were detected since the last pump cam pulse and the number of the pulses that should have occurred. There are approximately 64 high resolution pulses for every cam pulse.







Read more: http://engine-codes.com/p0372.html#ixzz3TGBdDBdF

Aug 06, 2014 | 1999 Cadillac Seville

1 Answer

Locating cam postioning sensor


Probably not, then. My understanding of the cam position sensor is that it is for sequential multi-port injection, and not for the older style of multi-port injection. In sequential injection, the computer times the injector pulse to coincide with the intake valve opening, and so the need for a camshaft sensor. Before sequential, the injectors were often "bank fired"- all the injectors on one side or bank of the v-6, v-8 were pulsed at the same time. 4 cylinder engines were similar I think, two injectors at a time were pulsed. GM started using SEFI back around 1991, I think, but took a few years before it was widely used.

Nov 08, 2013 | Cars & Trucks

2 Answers

No injection pulse


check the relay in the engine bay fuse box. it controls the power to the injectors

Oct 06, 2013 | Jeep Cars & Trucks

1 Answer

Why can't I get spart. Don't have injector pulse.


Loss of injection pulses usually means a loss of an engine timing signal or even the security pack preventing the vehicle from starting.
You need to check all the timing signals, crank angle sensors, cam angle sensors etc and ensure that any security is disabled or turned off.
Check for spark, if you have spark but not injection pulses, then its a timing signal issue. If you dont have spark or injection pulses, also check the ECU (the cars computer) although I do not know of any issues with this make and model.

Jan 14, 2011 | 1998 Ford Escort

1 Answer

My 1990 Chevy Celebrity wagon 3.1 multiport fuel injection is getting fuel to the rack at 45psi, but is not going through the injectors. Any idea the probable cause?


DO YOU HAVE 12 VOLTS ON INJECTOR WIRE ON ONE SIDE WITH KEY ON? IF SO ARE YOU GETTING SPARK? IF YOU HAVE NEITHER YOU MAY NEED A NEW CRANK SENSOR. VERY COMMON ON THIS ENGINE WHEN THERE IS A LOSS OF SPARK AND INJECTOR PULSE. INJECTOR PULSE(GROUND SIDE)IS CONTROLLED BY THE COMPUTER. IF YOU HAVE SPARK BUT NO INJECTOR PULSE AND 12 VOLTS ON INJECTOR FEED WIRE YOU MAY HAVE A FAUTY ECM(ENGINE COMPUTER)

Aug 31, 2009 | 1990 Chevrolet Celebrity

1 Answer

Engine pulsing in my 92 bonneville


reset the computer by disconecting the batery and it may stop

Jul 31, 2009 | 1992 Pontiac Bonneville

1 Answer

Engine cut while going dashboard sya injection fault


the multiport fuel injection module could be bad.check the injector pulse with a scope and make sure they are all the same.

Jul 04, 2009 | 2005 Renault 181

1 Answer

87 bronco 2 fuel injecter harness


Nope... they only inject fuel during the compression stroke of the engine. Thats how they were designed.

Jul 05, 2008 | 1987 Ford Bronco II

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