2004 jeep laredo 4.0.. Need help please!!! - JeepForum.com

 
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post #1 of 5 Old 05-07-2012, 01:05 PM Thread Starter
David_Hutch
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2004 jeep laredo 4.0.. Need help please!!!

Hi my name is David im a certified Asian motorcycle tech and know nothing about 4 wheels lol. I just recently purchased a 2004 jeep laredo 4.0 with 90,000 miles on it and i need help. I think i have either a fuel issue or a clogged cat. Its throwing a code P0031 which is Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) but i dont think that could be whats causeing my problem. whats happening is when i hit the throttle it will rev up to 3000rpm and start to break up. Sometime it will rev higher but still cuts in and out. which makes for a really rough ride cause the rpm and speed is right were the tranmission wants to shift so it jumps up and down through gears cause its breaking up. If i ease on the throttle it rides and shifts very smooth. stomp on it and the rpm goes up very slow and it start cutting out once it gets up in rpm.

PLEASE SOMEONE TELL ME WHATS GOING ON.

Thanks

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post #2 of 5 Old 05-07-2012, 01:12 PM
adolphhipster
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did you check your tranny fluid? and welcome
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post #3 of 5 Old 05-07-2012, 01:27 PM Thread Starter
David_Hutch
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Quote:
Originally Posted by adolphhipster View Post
did you check your tranny fluid? and welcome
I have checked the trans fluid and its good. It does it even if your in park or neutral reving it up.
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post #4 of 5 Old 05-07-2012, 04:53 PM
jeep_dude
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Could be a couple of things. I had a problem once with erratic idle - it would rev high and stay there, or suddenly drop to normal. I originally thought it was the TPS (throttle position sensor), but I wound up getting the crank sensor replaced when it broke down one day and ever since its been fine.
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post #5 of 5 Old 05-07-2012, 08:09 PM Thread Starter
David_Hutch
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Ok I haven't checked the crank sensor or tps yet. Is there a a/c volt reading the crank sensor should put out?
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