Question about 1999 GMC Yukon

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Hard to start engine turn over good, seem like it out of gas but its not

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It may be anything,a bad fuel pump, fuel filter, bad injectors, or electrical problem. It is a good idea to narrow the problem. First check if have a spark at spark plugs. After check the fuel pump. You can hear the noise if the ignition key is turned ON, but do not crank the starter. You can check the injectors with a needle stethoscope, if they work they click like a swiss watch. If it is the electrical problem most likely for this kind of cars a replacement of distributor cap and rotor, can cure the problem. I hope the spark plugs and spark plug wires has been changed already. Soon you have to replace the timing chain too. The most important thing to do is to narrow the area of troubleshooting. This can be done by excluding things that are O.K.

Posted on Oct 10, 2010

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