Question about 1994 Chevrolet C1500

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Help w 1994 chevrolet truck

1994 chevy k1500w/TBI 5.7 l engine will not start, put gas in TBI starts, changed filter, checked, gas is flowing at carb with key turned, changed injectors no start, pulled injectors car ran with gas just flowing into carb without injectors, put injectors back in no start, checked for electricity in wires to injectors w trouble lite seems to have electricity. Any Idea what is keeping injectors from picking up gas and injecting? Trouble started when ran truck out of gas.

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  • Shannon94V8 Nov 14, 2008

    I HAD A SIMILIAR PROBLEM, ENDED UP BEING AN O2 SENSOR.

  • Anonymous Nov 21, 2008

    Hi,

    I had the same problem on my 93 Jimmy, changed the ignition module (on the distributor) and every thing is ok !!



    Mario

  • rumble454
    rumble454 Dec 31, 2008

    i have a 1990 k1500 5.7 tbi i replaced the tps and map sensor and the fuel pump dont know where else to go

  • Anonymous Jan 01, 2009

    i changed my plugs, wires ,and dist cap, and there is alot of fuel from the pump its visable, it almost seems like too much. and lots of spark from my kyle.

  • 94gmc Mar 05, 2009

    1994 gmc sierra wont start, fuel will not come on when key is turned but will run if directly connected to battery, the injectors are not pulsing when the key is turned on, will start if gas is poured in the into the throttle body for a few seonds checked all the fuses they are good.

  • sue mm
    sue mm Oct 29, 2013

    i already changed the sensors (both) and it was fine for awhile...back to the same but, worse....now hard starting.

  • Anonymous Mar 22, 2014

    I am having trouble putting gas in my truck

  • Anonymous Mar 30, 2014

    the security light comes on when I try to start the truck, it will only start if I put gas in the carb, and the injectors are getting gas and they are good but they wont fire

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2 Answers

This injector set-up needs a specific fuel pressure supplied to the fuel rail to even start, much less run properly. The fuel pump is immersed in fuel inside the gas tank to keep it cool and not burn up. Running the fuel level low causes more heat in the pump and interuptions in proper fuel pressure. AC/Delco pumps have proven to be a reliable fix, the aftermarket pumps only last for a month or two sometimes. Check fuel pressure under the hood and power and ground to fuel pump at electrical harness at top of gas tank. This truck needs a fuel pump.

Posted on Oct 16, 2008

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  • Contributor
  • 10 Answers

Disconnect the batt. is your fuel pump running check fuse listen for it

Posted on May 28, 2009

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