I have a 91 XJ 4.0L. I just installed a rebuilt engine and it wont start. erratic spark from the coil. Its like spark, spark, pause, spark, spark, ... plugs at 1 and 4 get spark but no body else. every once in a while, it seems to want to start, and the coil will put out rapid sparks but it never will fire or stay running. New crank sensor, ECM, cap and rotor and ignition coil. Grounds test good, Batt cable, 3 lugs at the dip stick, and the body ground at the back of the head to the firewall.. Weird output from alternator, and batt side of coil though. It seems to drop out. The engine still wont start even if I short the batt side of the coil to the batt+. Bad Alternator or what?
I saw a identical thread posted here from a few years ago, but it seems to gone dead with no resolution.
I had a friend come over last week with his OTC scope/scanner. After a few hours of daughtering around he throws his hands in the air, packs up his gear and left.
I'm getting tired of shotgunning this thing and I'm running out of money. I'm also into it too deep just to junk it. There's something simple or too stupid for me to see here, Its gotta be just one small thing that I'm missing.
Thanks for your ears, and your suggestions. Let me know if you need more info.
I saw a identical thread posted here from a few years ago, but it seems to gone dead with no resolution.
I had a friend come over last week with his OTC scope/scanner. After a few hours of daughtering around he throws his hands in the air, packs up his gear and left.
I'm getting tired of shotgunning this thing and I'm running out of money. I'm also into it too deep just to junk it. There's something simple or too stupid for me to see here, Its gotta be just one small thing that I'm missing.
Thanks for your ears, and your suggestions. Let me know if you need more info.