having problem with bucking and surging on 1991 Ford Ranger

bucking surges at a stop. i have replaced mas and computer and truck still bucking and surges. no codes.

by in Oakwood, GA on December 29, 2011
1 answer 1 comment
ANSWER by on December 29, 2011
It could be many things, unfortunately and without experiencing the problem first hand or being able to do some basic diagnostic tests its hard to say. Look for air/vacuum leaks around the intake manifold. Look to see if the EGR valve either leaks or does not seal/fully close. Important to look and see the ignition system isn't causing the misfire/stumble.
COMMENT by on December 30, 2011
if ignition is causeing mis fire would it show a code

Related Content