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  #13  
Old 05-04-2010, 01:03 PM
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Re: Misfires - '02 JGC Limited...

perhaps a deep cleaning solution like sea foam could help? im sorta leary...
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  #14  
Old 05-04-2010, 03:05 PM
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Re: Misfires - '02 JGC Limited...

I have red good experiences from other people regarding Seafoom. Its worth to try and would be a cheap solution if it works. Its not available where i live, so i have no experience with it.
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  #15  
Old 05-04-2010, 03:54 PM
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Re: Misfires - '02 JGC Limited...

Is it still happening?
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  #16  
Old 05-05-2010, 03:36 PM
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Re: Misfires - '02 JGC Limited...

I was just reading about misfire on the 4.0 engine. There it can happen that carbon buildup on the exhaust valves can prevent the valves from closing completely. It will especially happen when normally the engine RPM is below 3200. The valves should normally rotate a bit, whereby eventual carbon will be removed, but at speed below 3200 RPM the valves will not rotate and the carbon buildup starts. So it can be that the same is valid for the 4.7. Seafoam could help you out in that case.
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  #17  
Old 05-06-2010, 03:13 PM
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Re: Misfires - '02 JGC Limited...

good note.... ill try to locate the stuff.

i just changed my oil... crud. we'll see.
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Old 05-06-2010, 05:15 PM
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Re: Misfires - '02 JGC Limited...

Alright. I did the 1/3,1/3,1/3 seafoam thing. They say you can leave it in and run it.. Just keep a close eye on the oil condition. I also put it into my gas and ran it thru a line. All kinds of smoke poured out. Hopefully in that smoke was my problem.

Cross ur fingers

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Old 05-06-2010, 07:49 PM
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Re: Misfires - '02 JGC Limited...

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Originally Posted by Kpurintun View Post
Alright. I did the 1/3,1/3,1/3 seafoam thing. They say you can leave it in and run it.. Just keep a close eye on the oil condition. I also put it into my gas and ran it thru a line. All kinds of smoke poured out. Hopefully in that smoke was my problem.

Cross ur fingers

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Make sure you change your oil in 500 miles or less. Saving $50 in synthetic oil and filter isn't worth potentially blowing your engine b/c of bad oil.
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Old 05-07-2010, 08:26 AM
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Re: Misfires - '02 JGC Limited...

do you think i should run another couple rounds of the stuff thru the vacuum lines a couple days apart?

kyle
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Old 05-07-2010, 12:15 PM
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Re: Misfires - '02 JGC Limited...

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Originally Posted by Kpurintun View Post
do you think i should run another couple rounds of the stuff thru the vacuum lines a couple days apart?

kyle
I don't think so. When I ran it through my Mustang I actually let it stall out the car when it was pulling it into the vaccuum line. Once it stalled out, I let it sit for 5-10 minutes before starting it up again.

This way the seafoam was in the entire air system and would sit and work after it stalled.
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  #22  
Old 05-07-2010, 02:26 PM
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Re: Misfires - '02 JGC Limited...

I don't know how agressive this stuff is. I should say that when you don't get the CEL anymore, to leave it as it is. But maybe someone else knows it better and can give you a better answer.
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  #23  
Old 05-07-2010, 03:04 PM
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Re: Misfires - '02 JGC Limited...

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Originally Posted by JeepMe View Post
I don't think so. When I ran it through my Mustang I actually let it stall out the car when it was pulling it into the vaccuum line. Once it stalled out, I let it sit for 5-10 minutes before starting it up again.

This way the seafoam was in the entire air system and would sit and work after it stalled.
i haven't been letting it stall... i have been backing off a bit when it gets close...
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  #24  
Old 05-08-2010, 08:26 PM
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Re: Misfires - '02 JGC Limited...

well.. im running the in-vacuum line treatment multiple times... seems the engine runs better.. but still get the codes... but its longer time until they come back.
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