Hi guys, new here and in search of my never ending problem. I have a 96 s10 4.3 vin X 5spd. The problem I am chasing is a misfire and cruising at steady speeds. Its not there much at idle or WOT..Never the less the problem seems worst when the truck is cold.
I've done a full tune up on it, plugs, wires, cap, rotor. I've also replaced the EGR valve because I am getting an EGR position P1406 at times. I did a temperary block off to make sure I wasnt getting any bypass EGR gasses that could cause my problem. I replaced the intake gaskets due to leaking and all this has got me no where but upset and broke.
I did find that my coil was arcing, so I went and got a replacement ACDelco coil...Thinking I had solved my problem I took it on a drive. NO CHANGE. Later that night I checked the ignition system again only to find that my new coil is arcing in the exact same way the old one was.
I've hooked up a tech2 to it and watched the sensors, even manually operated some of them. The only one that makes me question what it is doing is the TPS % bounces with the truck running, anywhere from 8%-0%, but with the key on engine off I can hold it at a steady 8%
Anyone know of a solution to my arcing?????