I have a 1989 S-10... with a 4.3 Liter motor... over 100,000 miles... and when I bought it... someone had headers and dual exhaust ran on it... So... no Oxygen sensor was on it... I ran it that way for a few years... but recently put the Exhaust Manifold back on and a new crossover... took it back to single tailpipe... and put a new Oxygen Sensor in it... Now my enging runs terrible... It acts like it has a miss... When I am accelerating and speeding up its fine... and when you first start the truck and it is idling its fine... but when you try to run a constant speed it sputters and misses and acts like the fuel filter is bad or something... But I just changed the fuel filter in it and it is still acting up... Any suggestions???
Sep 18, 2010 at 10:49 AM
