Question about 1999 GMC Yukon

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I have tried every thing to set the timing on my1999 gmc yukon me and 4 other mechanics are stumped any suggestions please im desparate. Again I have replaced the timing chain, the ignition cotrol module, cap and rotor, coil, crank sensor, cam sensor, im getting fire but no start

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Was #1 cylinder top center conjunction with distrbuter botton on #1 plug was cam gear matched with crank lined up

Posted on Nov 29, 2011

  • kushkloudzgy Nov 29, 2011

    Yeah it was lined up the computer fried I gave up got me a dooley :) thanks though

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You have spark at the plugs right? Have you checked fuel pressure? It has to be 60 psi or it won't even fire.

Posted on May 30, 2011

  • 2 more comments 
  • kushkloudzgy May 30, 2011

    Spark plugs are right and fuel pressure is good its gettin fire and gas but no start.

  • kushkloudzgy May 30, 2011

    It acts like its about to start then you hear psshhhhh and it loses it

  • Clint Smock
    Clint Smock Jun 01, 2011

    After it quits is the security light blinking?

  • kushkloudzgy Nov 29, 2011

    Gave up computer fried and got me a dooley :) thanks though

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Purchasing


That's a lotta miles!! My suggestion would be to take the Yukon to a reputable mechanic and pay the $50 to $100 to have him check it over. Specifically have him check the compression, suspension, transmission, clutch, (if manual), AC (if applicable), etc and then get his opinion. Good luck

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