Question about 1997 GMC Sierra

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My 97 GMC SIERRA K1500 truck wont start but will turn over and some time's back fire thru air filter. pulled plug's 1 & 2 were dry the rest were wet.

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Stretched timing chain it appears to be your problem if back firing

Posted on Sep 11, 2010

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  • unclehooty Sep 13, 2010

    it is a brand new engine I put it in last june everythine is new except distrubitor, map sensor, fuel pressure switch. today I tried to start in and all the plug's were dry could it be fuel injector's ?

  • frank thomas wilson
    frank thomas wilson Sep 14, 2010

    It can be the distributor althoug it would need to be pulled out for a inspection..

    Fuel injectors can be a problem as well. You state a back fire which is caused by off timing

  • Kenneth Bowers Oct 23, 2012

    mine has the same problem except it dont backfire. my cyliders was full of gas because the seal to my fuel regulator was bad, just take your intake manifold off and turn turn the truck over and inspect where it is spitting out gas.

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