studering 1988 chevy 305

1988 GMC C1500
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WRENCHER1966
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1988 chevy k1500 305 v8 4wd studers very bad at idle & when you push gas peddle. plugs, cap, wires ,rotor, map sensor & o2 sensor was replaced fuel pump is only 4 months old not throwing any codes. does it at idle & under load in gear
Feb 17, 2006 at 8:59 AM
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HTIEK8497
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sounds to me like sticking valves try marvil mystery oil in the gass for a few tank fulls
Feb 17, 2006 at 7:24 PM