Question about 1991 GMC C1500
Have you tried a good fuel injection cleaner?Not just any cheap injection cleaner,look for a product called lucas,it does the trick,cleaning fuel lines and e g r components ,and injectors,and combustion chambers.It will clean the valves also,so try this before any other parts are installed.If this does not help,have a cylinder balance test done,and compression test,on each cylinder.
Posted on Nov 13, 2009
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Posted on Jan 02, 2017
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