Question about 1991 Chevrolet Lumina

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1991 CHEVY LUMNIA 3.1 WILL NOT PULSE INJECTORS,HAS NEW ECM,CRANK SENSOR AND WATER TEMP SENSOR WHERE DO I GO NEXT ?

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I have spark into the plugs bran new fuel pump 55 lbs fuel rack has fuel but engine wont fire it just turns over wont start

Posted on Aug 16, 2010

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How's the fuel pressure?

Posted on Jul 07, 2010

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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)

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1 Answer

Car has no spark or injector pulse(new ecm,crank sensor)


Check the fuse for the injectors, some vehicles have the injectors and coil running on the same circut, at the same time check the fuse for the ignition.

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1991 chevy camaro 3.1


Mine had a similar problem, there is a wire that goes from the computer to the fuel rail and this wire sends info on how much fuel and when to inject the fuel... if that wire is grounding out then this will cause the lack of cylinders to fire and also explain the inconsistency. So i would start with the fuel rail..hope this is of some help

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