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Mine ended up being the Crankshaft Position Sensor. $35 and took about 15 minutes. This after lots of work shown earlier in this thread. So, can't hurt to start there.

1st, sorry to hear about the misfire issue, I know how incredibly frustrating it can be. To tell you the truth I sold my TJ just after all the repairs, so bare with me. One sensor that I was considering changing was the Cam Position Sensor located in my distributor. You may want to check that...

Misfires FIXED - Crankshaft Position Sensor! Had the 441 code still this morning. Ended up emptying out charcoal from the upper hose on the purge solenoid. During my head rebuild I accidentally flipped the canister over, so wonder if this had something to do with it. If there's still a problem...

No. 2 were worn and 1 was close to worn so he changed all 3. The rest were fine. None burnt. Any other signs of running lean? As far as the misfire codes, they're all the same as before, with the exception of 1 less (PO302 Cylinder 2 Misfire Detected): PO300 Random/Multiple Cylinder Misfire...

I just finished a valve job. Pulled the head and took it to a shop. They also put in all new springs and replaced valves where they were worn. I buttoned it all up the other day cleared the old codes and 47 miles later they came back. Today I'll be running a new compression test. How do I...

First, thanks for reading that thread and putting in the time, I do appreciate it. I drove on the fwy to pick my kid up at school today. At 65mph it was just over 2500rpm, at 75mph it was just over 3000. The interesting thing was by those speeds the "Check Engine" light would have come on. I'm...

Yes Yes, see previous included link. What is "up to WOT?"? Just under 1k

It doesn't backfire at all, runs very smooth. If the check engine light were never on you'd never know there was a problem. Instead of posting everything that I've done please see this post. I'm "T's '97TJ". It'll probably help out more than me bumbling things up by reposting.

"Autolite 985", not sure, can't recall if they're APP or AP. They don't read "Platinum", is that what the second "P" is for?

Thanks for the reply and suggestions. Sorry it took a day or so, but a big turkey got in my way. The Tach sitting at an idle. Not too long ago I ran a dose of Seafoam through the valve cover, vacuum line and gas tank after a similar suggestion elsewhere. Didn't get big puffs of smoke like...

Hmmm, not sure if this is my problem then. The milage is horrible 11 -12, but I do have 190k on the engine so wonder if it's simply age. Runs great, smooth, never hesitates and has never stalled. As far as starting I do have to turn the key and wait about 5 seconds then she cranks over fine. If...

Michael, what narrowed it down to the crank sensor even a year ago? Is this an easy repair?

Funny, I read a similar article/post over at either Wranglerforum or Jeepforum. Hate to have to spend that much cash but... The worst thing is that it doesn't effect my nice, smooth ride, only passing smog and that just takes a reset to get rid of the code. My milage has gone down to about 11/12...

Hey Utah, I know this thread is a bit aged, but did the fuel pump and pump assembly end up being the problem? My '97's been throwing the same code for a long, long time and I haven't had a mechanic able to track it down. Thx