Question about Chevrolet Blazer

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2002 s10 blazer 2wd v6 4.3. hard to start. once its started it idels fine and revs fine. but once you drive it it has no power. if driven really nice it drives fine but one you really give it some gas it has no power. the rpms come up but wont excelerate.sounds like it starving for something. fuel pressure reads 51. i have put in a new fuel filter, plugs wires cap and roater and still nothing.

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  • Chevrolet Master
  • 17,970 Answers

These engines are notorious for a leaking lower intake gasket, as well as the fuel injector assembly being faulty. You may have a fuel pump going out, you have to put a fuel pressure gauge and/or a scanner on it and see what your fuel pressure is and if you have any codes.

Test with pull the plug wires off the distributor coil one at a time and see if theres any greenish build up on the tips of the coil. When bad wires or a coil gets warm they will lose the strengh of the spark and you will lose power. Look into a weak coil pack or a bad ignition module.

On the carb there is a sensor/solenoid that richens up the mixture for cold start purposes. Its been a while since i have worked on a tbi engine so i cant remember where it is at but look for a sensor or a solenoid (its not the fuel injector solenoid/s) on the carb.

Tell us news.

Posted on Jul 21, 2010

  • ZJ Limited
    ZJ Limited Jul 21, 2010

    Also, I could adventure to tell you look the EGR solenoid / sensor and the EGR valve.

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