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99 wj 4.0 major idling and running issue

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Old 05-31-2016, 06:54 PM
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Default 99 wj 4.0 major idling and running issue

Hi, first post but to keep it short i got in a wreck the other day, kinda smashed up my radiator a bit with it leaking quite a bit, deff over heated hard core a few days later not enough water....so obviously i fried something....its having issues now with cranking up, idling and its running really rich smelling, sometimes it smokes out the tail pipes bad, fresh oil around the oil filter placement, im almost positive water in the oil, this weird gooey stuff that started in the air intake....

The first time i got the ebgine light checked it said missfire cylinder 2...changed it now theres a list, same cylinder issue, crank sensor needs to go, multiple cylinder misfire, throttle position sensor circuit high output, single cylinder combustion misfire within 1000 engine revolutions cylinder 1, and throttle position sensor does not agree with map...

Ive seen a bunch of stuff online but i couldnt put everything together n could use some help if you guys dont nind, did i blow a head gasket or what? Im still driving it lightly burning thru gas n filling with water always, n its not leaking anymore btw n sometimes it smells like straight oil burning
Old 05-31-2016, 06:56 PM
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Originally Posted by Beastatpoi420
Hi, first post but to keep it short i got in a wreck the other day, kinda smashed up my radiator a bit with it leaking quite a bit, deff over heated hard core a few days later not enough water....so obviously i fried something....its having issues now with cranking up, idling and its running really rich smelling, sometimes it smokes out the tail pipes bad, fresh oil around the oil filter placement, im almost positive water in the oil, this weird gooey stuff that started in the air intake....

The first time i got the ebgine light checked it said missfire cylinder 2...changed it now theres a list, same cylinder issue, crank sensor needs to go, multiple cylinder misfire, throttle position sensor circuit high output, single cylinder combustion misfire within 1000 engine revolutions cylinder 1, and throttle position sensor does not agree with map...

Ive seen a bunch of stuff online but i couldnt put everything together n could use some help if you guys dont nind, did i blow a head gasket or what? Im still driving it lightly burning thru gas n filling with water always, n its not leaking anymore btw n sometimes it smells like straight oil burning
It is fried. Time to rebuild.
Old 05-31-2016, 07:16 PM
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Originally Posted by KaMoore
It is fried. Time to rebuild.
Lol not the answer i was hoping for :/
Old 05-31-2016, 07:27 PM
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Originally Posted by Beastatpoi420
Lol not the answer i was hoping for :/
Maybe not, you asked though. The nice thing about it is you can get a rebuild kit for around $400.00 and if you are mechanical at all rebuild it yourself.
Old 05-31-2016, 09:45 PM
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Originally Posted by KaMoore
Maybe not, you asked though. The nice thing about it is you can get a rebuild kit for around $400.00 and if you are mechanical at all rebuild it yourself.
i can get down on some stuff but in all reality i dont know much, ive done all the work on it besides the cv joints but yeah im prob just gonna trade it for something else :/ prob not a jeep n btw everyone this wj my first vehicle had it for 3 years n im 24...Absolutely love it up in colorado
Old 06-01-2016, 12:42 AM
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Why not just replace the engine with a good used one. Late model 4.0s are scarce and the pre-99 ones won't fit. Just an option. The 99-01s had a head problem anyway. I have a replacement head on mine. 193K and the only problem was the cracked head.

I'd hate to see you throw away a perfectly good jeep because of a bad motor. Not to dump on you, but you ruined it yourself by driving it while it was overheating.

Last edited by dave1123; 06-01-2016 at 12:45 AM.
Old 06-01-2016, 09:53 AM
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Originally Posted by dave1123
Why not just replace the engine with a good used one. Late model 4.0s are scarce and the pre-99 ones won't fit. Just an option. The 99-01s had a head problem anyway. I have a replacement head on mine. 193K and the only problem was the cracked head.


I'd hate to see you throw away a perfectly good jeep because of a bad motor. Not to dump on you, but you ruined it yourself by driving it while it was overheating.
Yeah i already know :/ shes been my baby and im gonna miss her but i think ima have to sell it for the coming court fines for the wreck cause i didnt have insurance :/
Old 06-01-2016, 10:08 AM
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Originally Posted by Beastatpoi420
Yeah i already know :/ shes been my baby and im gonna miss her but i think ima have to sell it for the coming court fines for the wreck cause i didnt have insurance :/
About how long do u think i have driving it
Old 06-02-2016, 05:30 AM
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Old 06-02-2016, 05:32 AM
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Your guess is as good as mine.
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