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finneys98xj
06-28-2009, 07:59 PM
My jeep is being a BITCH! It back fires between 15-2000 RPMs and acts like it backfires and lose power for a moment. Things I know it aint are CPS, coil, Dizzy, plug wires, plugs, battery, and I'm getting good fuel pressure. I need help guys please!

BlueXJ
06-29-2009, 12:57 AM
Something is causing it to lose the electrical circuit alien. That is why it is backfiring. The fuel is filling the cylinders and there is no ignition for a few seconds then when the ignition is back on the extra fuel ignites and causes a backfire.
You may have a bad ground or a loose connection somewhere in the ignition curcuit.

Mudderoy
06-29-2009, 02:29 AM
I believe that problem happened to mine (occasionally) because of a failing TPS. Since I have replaced it I haven't had any more backfire issues.

finneys98xj
06-29-2009, 07:24 PM
TPS didnt fix it either. I'll sell this thing for 500 if anyone wants it. Man it is making me want to drive it off a cliff

finneys98xj
07-03-2009, 08:57 AM
Well i unpluged half of my harness and pluged it back in and it cleared up all except it misses every once in awhile while driving.

Mudderoy
07-03-2009, 09:06 AM
I had a miss, but I could only tell it was there at idle. It was the CPS.

If I reset the computer the miss would go away for a day or so, sometimes shorter. It was weird. Had it for a year or so, but went completely away with the CPS replacement.

It ran a little ruff, I don't think anyone else would notice, so I replaced spark plugs cap and rotor. Smooth as silk now.

BlueXJ
07-03-2009, 10:38 AM
TPS didnt fix it either. I'll sell this thing for 500 if anyone wants it. Man it is making me want to drive it off a cliff

Do you take PayPal?? Give me a e-mail to send it to. No cliffs please.

finneys98xj
07-03-2009, 02:02 PM
Do you take PayPal?? Give me a e-mail to send it to. No cliffs please.

lol I got the prob. more narrowed down! The plug I keep unplugs to make is run perfect with out a miss is the one right at the back of the valve cover. Now what does that go to?

Melissa
07-03-2009, 11:53 PM
lol I got the prob. more narrowed down! The plug I keep unplugs to make is run perfect with out a miss is the one right at the back of the valve cover. Now what does that go to?

The plug at the back of my 93 valve cover is part of my ccv/pcv system, if that helps

Melissa
07-04-2009, 02:57 AM
Wait you are talking about this plug on the top at the back of your valve cover...............................right? Or am I waaaaaay off base?

http://i730.photobucket.com/albums/ww305/melreese83/misc%20pictures/HPIM0398.jpg

finneys98xj
07-04-2009, 08:32 AM
No not that one but thanks for the attempt. Its a connector on the other side just out of site of that pick. I'll try to get a pic later.

Melissa
07-04-2009, 08:46 AM
Oh sorry, here I was thinking I just might actually know something that might help a jeep out :boohoo:

Oh well, back to learning :D