Question about 2002 Chevrolet Blazer

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Chevy S-10 p0300 and po507

I have a Chevy S-10, its a 2002. Ever since i got the truck the check engine like has been on and off (code po300).. all on its own. ive done spark plugs, wires, coils.. the whole bang. still doing it. now its sending off both po300 and po507. even when parked it revs up.
help?

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If it is reving at idol I would be checking my throttle body for air leaks your computer will tell your engine to loop higher, to try and correct the readings it is getting.

Posted on Apr 19, 2010

  • jtzz Apr 19, 2010

    an easy way to test if it is leaking, is to put an unlit propan torch with the propan on to the base of the throttle body. If the engine revs higher it is because it has sucked the propane in an ignited it then u know u have a leak. keep me posted on what you find

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Posted on Jan 02, 2017

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