1992 Chevrolet C1500 Logo

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Posted on Mar 12, 2009
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93' 4.3 chev runs rough at times

Hard to start, have to floor it and when it starts runs rough for a mins then smooths out, run rough sometimes when driving around town

  • 7 more comments 
  • jtschwable Mar 12, 2009

    ok ill try that also i forgot to add that i add some injector cleaner to my gas and it seemed to help would start on first crank and run fine then start up again half way threw tank

  • jtschwable Mar 12, 2009

    its a 93" not sure on the TBI or CPI

  • jtschwable Mar 12, 2009

    yes it has a round air cleaner

  • jtschwable Mar 13, 2009

    ok thanks im going to try it first thing in the morning

  • jtschwable Mar 15, 2009

    ok i checked the o rings and didnt see any leaks, and this morning on my way to work its starting to run rough alot more if i slow down at a light, also fuel filter and fuel pump has been changed in the last 6 months

  • jtschwable Mar 15, 2009

    no check engine light and with it being a 93 i cant check it my self

  • jtschwable Mar 15, 2009

    ahh i'll try that and see what i get thanks

  • jtschwable Mar 15, 2009

    ok all it flashed was 12 over and over

  • jtschwable Mar 15, 2009

    could it be my TPS, or would it throw a code if it was that.

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  • Posted on Mar 12, 2009
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Have someone turn the key on while you watch the injectors. If any gas leaks out of the injectors, without cranking on it) replace the o'rings around the injectors.

  • 4 more comments 
  • Anonymous Mar 12, 2009

    Wait a minute, is this a 1992 C1500 with a 4.3 TBI or a 1993 4.3 with TBI or CPI? This makes a big difference.

  • Anonymous Mar 12, 2009

    Is it a C1500 with a round air cleaner on top of the engine.

  • Anonymous Mar 13, 2009

    O.k. then it is TBI. Do the procedure that I posted first.

  • Anonymous Mar 15, 2009

    Any check engine light?

  • Anonymous Mar 15, 2009

    Yes you can, all you need is a paper clip. Jump terminals A and B of the ALDL connector and the check engine light will flash trouble codes.

  • Anonymous Mar 16, 2009

    O.k. no codes. 12 means system O.K. Try starting with the coolant temp sensor unplugged.

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