2001xjr

This thing is kicking my butt!! I have a miss that came on gradually and got to the point it's too bad to drive. I have done everything I can think of. I have disconnected all MSD. The kicker is after spending countless hours chasing the problem, I found by unplugging the alternator the miss it completely gone. So I thought I had a internal short. So I install a new alternator, thinking I finally got it. Wrong!! I'm done.....anyone else every run into this before?

mattdel

Can't say I've ever heard that before... doesn't really make any sense. Something must be wired wrong.

2001xjr

All stock wiring. I'm just wondering if it's a computer issue? I thought about just start unplugging sensors and see if I can follow it, but not sure if any or what else would cause it. I'm wondering if a bad 02 would cause that. If you follow the wiring diagram it all ties in to each other. I'm just burnt out on this thing....

mattdel

I highly doubt it's a computer issue. The only reason the misfire would go away is if the alternator was putting out excessive voltage, which it's apparently not. This is likely not a sensor issue but a wiring flaw somewhere, be it a broken fuseable link or a bad ground or something along those lines.

2001xjr

Thanks for the input. I'm going to tear back into it and look at all the links and grounds.

Bob