pregrid
New member
Workin' with a '95 YJ 4.0 liter 6 cyl. My son's Jeep. Just put in a reman long block from ATK. On first fire-up it ran really good for several minutes, then started to stumble on accel and finally died. Found we had missed one important step (been wrenchin' professionally for 40+ years and sometimes this still happens), forgot to hook up the ground cable from the battery. Now it will start after a lot of cranking, runs rough, smoothes out, runs rough then suddenly dies like you shut the key off. I fear we have smoked something electronic because we have spark to the plugs, fuel to the injectors, and injector pulse (checked with a noid light). Any help would be appreciated.
Dave
Dave