Recently I changed the spark plugs on my 99' TJ because it was hesitating and running rough. It ran great for about a week then it started running rough again and it was having a hard time starting. I'd have to crank it for a while. Well I didnt drive it for a few days and now it wont start. Any ideas?
From bad to worse
- Thread starter Sully
- Start date
mud4feet
New member
How'd the plugs look when you took them out?? Look like they'd been fouling? Did you change out the wires, too? Maybe a bad coil pack??
Just throwing out some ideas.....thinking of things, other than plugs, that would've caused the hesitation/running rough. The dang computers make 'em a whole lot harder to diagnose. Dang O2 sensors cause fits, too, but I can't imagine them causing a "no-start".
Hope it's something simple........................someone's bound to be more helpful than me.
Just throwing out some ideas.....thinking of things, other than plugs, that would've caused the hesitation/running rough. The dang computers make 'em a whole lot harder to diagnose. Dang O2 sensors cause fits, too, but I can't imagine them causing a "no-start".
Hope it's something simple........................someone's bound to be more helpful than me.
Bounty__Hunter
Super Moderator
Is the check engine light on? I'd have it checked for a code.
My bet is the throttle position sensor (TPS) or crank position sensor (CPS).
My bet is the throttle position sensor (TPS) or crank position sensor (CPS).
what I am thinking.
Took it to pep boys for the code, they said they didnt know what it was and wouldnt give me the code for some reason. Told me to take it to the dealer. To make things even better the saturn I have been driving sucked a valve on the way home tonight. Now I have to drive a jeep that only works when it wants to and I have two cars to fi. :x
jfrabat
New member
Some time ago I found and bought a code reader that was compatible with the Jeep's OBDI (along with Ford, Chrysler, and GM, if I remember correctly, and all of the OBDII) and it has been very helpful. Price was not excessive, and it sure is a lot easier to read than counting the CEL with the strange timing it has... Maybe you can look one up on eBay or something.
I heard that advanced and pep boys won't give you the codes but I've alway had good luck with Auto Zone.
I did eventually get my own OBDII code reader though. It was only $60
While we find your parts, please enter your ZIP Code at PartsAmerica.com
I did eventually get my own OBDII code reader though. It was only $60
While we find your parts, please enter your ZIP Code at PartsAmerica.com
oh yeah - you can find the computer codes in the reference section:
Reference - Jeepz.com
Reference - Jeepz.com
any luck on this yet? iv heard of a few problems like this the codes were cam shaft or crank shaft sensor related and they were signal problems the one that i looked had a bad distributor. it would fire sometimes stall hesitate backfire etc.... well we pulled the distributor and the shaft gear was all banged up so intermitantly it would not get cam signals and also throw crank signal faults. might wanna check that if you havent figured it out yet if u did im interested in knowing what it was.... good luck
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