1989 5.7 vortec rough idle bad vibration a t2000 to 2500 rpm above is smooth ALL gas delivery componets new and ALL electrical componets new

Asked by Jan 06, 2015 at 11:47 AM about the 1998 Chevrolet C/K 2500

Question type: Maintenance & Repair

motor temp is not a factor or gas oct. value
all electric and gas delivery systems ave been replaced  and are operating

2 Answers

17,725

Does this happen in gear or in neutral only? Or both?

manual 5 speed all gears Starts at 2100 to 2500 then goes away typo the year is 1998 doesn't make a difference OK now this week with the cold weather it is running very well thru all gears At no time have I ever had a code pop driving me crazy

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