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Jeep Wrangler JK
JK General Discussion
07 JK engine hesitation
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<blockquote data-quote="Toxicity JK" data-source="post: 460287" data-attributes="member: 25416"><p>07 JK 3.8 V6 automatic. SO lets start by detailing what the Jeep is doing. It has developed a hesitation for lack of a better word (almost feels like a misfire, but is not causing a code). The hesitation seems pretty random as it doesn't occur at the same RPM or just on acceleration. Along with the hesitation when driving, it also has an intermittent rough idle and will occasionally die when at idle. Again no discernable pattern to it seems to be almost completely random. Another odd factor is i thought it could be dirty injectors so I ran 2 cans of Seafoam through it. Both times it ran perfectly for the first 2/3 of the tank then started doing it again and got worse in the last 1/3 as the fuel level got lower. </p><p>What I have already done/replaced</p><p>MAP sensor</p><p>PCV valve </p><p>plugs</p><p>plug wires</p><p>cleaned throttle body</p><p>All of these seemed to help the engine run quieter and smoother until the random hesitation. </p><p>The latest twist to this tale is yesterday the gas cap warning came on and will not go off even after replacing the gas cap.</p><p></p><p>Any ideas? fuel injectors? Fuel pump filter screen?</p></blockquote><p></p>
[QUOTE="Toxicity JK, post: 460287, member: 25416"] 07 JK 3.8 V6 automatic. SO lets start by detailing what the Jeep is doing. It has developed a hesitation for lack of a better word (almost feels like a misfire, but is not causing a code). The hesitation seems pretty random as it doesn't occur at the same RPM or just on acceleration. Along with the hesitation when driving, it also has an intermittent rough idle and will occasionally die when at idle. Again no discernable pattern to it seems to be almost completely random. Another odd factor is i thought it could be dirty injectors so I ran 2 cans of Seafoam through it. Both times it ran perfectly for the first 2/3 of the tank then started doing it again and got worse in the last 1/3 as the fuel level got lower. What I have already done/replaced MAP sensor PCV valve plugs plug wires cleaned throttle body All of these seemed to help the engine run quieter and smoother until the random hesitation. The latest twist to this tale is yesterday the gas cap warning came on and will not go off even after replacing the gas cap. Any ideas? fuel injectors? Fuel pump filter screen? [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
07 JK engine hesitation
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