Question about 1993 GMC Sierra K1500
Yes this is definitely due to timing or plugs. First check the timing belt. It could be loose and needs to be tightened. If timing belt is OK remove each plug & check that the gaps of all the plugs are the same & that there are no oil deposit at the ends. If the plugs spark points are worn out, replace the plugs.
Posted on Nov 11, 2010
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Posted on Jan 02, 2017
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