Question about 1997 GMC Sonoma

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Truck pulsating when warm

97 sonoma after driving short distance starts skipping and sometimea back fires

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  • rudy5447 Feb 22, 2009

    i already put new timming chain and gears

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If the engine has a timing belt it may be time for a new one.

Posted on Feb 22, 2009

  • Sam Shamblin Feb 22, 2009

    What engine are you running? What else have you done to the engine? How did you verify the timing when you replaced the chain and gears? Did you check it with a timing light after you had the engine running? You can be 1 tooth off on cam to crank time and the engine will run fine cold at idle but, once it warms up it will be a whole new ball game.

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