Question about 1988 Chevrolet Suburban

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Replaced fuel injectors,plugs,wires,cap rotor every thing

After replacing all that, still miss fires. ran fine for a minute then still miss fires.dont know what else to do?

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  • justincase91 Sep 05, 2009

    not sure what else to do

  • justincase91 Sep 07, 2009

    it seems to idle fine, its while driving that it runs rough.we hooked a computer up to it and it read random miss fire.

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  • Master
  • 5,158 Answers

Is there a misfire at idle as well as when you are driving it. ?

Posted on Sep 05, 2009

  • Roberta Smith
    Roberta Smith Sep 06, 2009

    yes but i need to know. does it misfire during all driving conditions or only when it is idling ?

  • Roberta Smith
    Roberta Smith Sep 07, 2009

    buy a bottle or two of gasline anti-freeze. add one to the tank now and one next time you fill up. it sounds like water in your fuel and that will absorb it. works just about instantly



    robert

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  • Master
  • 2,004 Answers

Replace fuel pump and filters will do the trick.

Posted on Sep 05, 2009

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1 Answer

Van running like its missing


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use a quality injector cleaner for a few tanks of fuel
ECM controlled cars do not a tune up as the computer does that 60 times a minute so all you need to do is to run the fault codes and fix the faulty sensors
fault codes are being recorded all the time and only the serious engine or transmission faults put the engine light on

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  2. If after repairing any timing issues you are still facing this problem, it may be time to have the fuel injectors tested and the fuel pump tested and replace as necessary.

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Repaced rotor cap plugs wires, ran fine. tell


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1988 5.7 TBI Nightmare This is the start of what the problem was and is, I had a RV cam installed when the engine was rebuilt a year ago. the cam was not a computer friendly cam so after a round with the rebuilder and discovering the specs weren't the correct ones for the cam I installed a 3702 edelbrock cam and lifters with a 7800 timing chain and gear set after I had tried two chips from Jet and no improved performance and the 3rd chip was to be for the cam and that is what is in the ECU now and I have tried about 5 different BCC chips and the bottom line is the power is there but something is happening its hit and miss the idle will sometimes lope, is stalled when first started and acts as if its starving for fuel or its bogged with to much fuel. the fuel pressure is 10 - 13 psi and I have R/R the TPS, IAC, ESC and knocks device , EGR and Solenoid, MAP, Temp sensor, and the Dist is a Procomp 10001 with a MSD-5526 coil. the Throttle Body was rebuild and the ECM was replaced with a Rebuilt ECM. it will smell rich etc. but with the things that goes on it does not show any codes?? I have no clue just feel stupid this is been a simple thing that is kicking my **** and now its a challenge but still loosing the fight too far in and too much spent to stop,. LOL Help !!!! The BCC is a california vehicle AFBX, 5.7TBI TH400 A/T P.S. the key can be turned of and back on as the engine not dying and seems to correct the power and run problems but will not last goes back to running bad or with problems. ?

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