check engine light - Page 2 - Rubicon Owners Forum
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post #11 of 19 (permalink) Old 12-31-2018, 11:05 AM
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Light returned even after new gas cap, any likely suspects I should check for evaporative leak error code? Thanks
Last time my TJ had this code I found a very loose line under the hood, drivers side, next to the intake manifold. Re-setting that connection and adding a clamp fixed it for me.
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post #12 of 19 (permalink) Old 01-01-2019, 11:14 AM Thread Starter
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Mouse, did you find by eye or did you need to use smoke machine?
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post #13 of 19 (permalink) Old 01-02-2019, 09:13 AM
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Mouse, did you find by eye or did you need to use smoke machine?
Just by eye - it was very apparent when I found it.

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post #14 of 19 (permalink) Old 01-02-2019, 02:40 PM
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Mouse, did you find by eye or did you need to use smoke machine?
Ken,
I made a paint can smoke machine from a utube example. I was chasing down a check engine light and gave it a try.

I hooked the smoke tube up to the intake after removing a vacuum line that goes to the brake system. I used a 12v air compressor for airing up tires. I did find a small leak and replaced a hose. It didn't change my check engine light problem though.
Bob

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post #15 of 19 (permalink) Old 01-02-2019, 06:03 PM Thread Starter
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Thanks sierrabob
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post #16 of 19 (permalink) Old 07-19-2019, 09:06 AM Thread Starter
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Mouse, could you send picture of where you found your under hood evap leak please?


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post #17 of 19 (permalink) Old 07-19-2019, 09:20 AM
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I wouldn’t abandon the gas cap as the culprit unless you purchased the new one from the dealer. I’ve had good luck taking the gasket off the parts store gas cap and putting it on the factory unit.
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post #18 of 19 (permalink) Old 07-20-2019, 01:54 AM
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I've chased that same error code for years, on and off about every year or year and a half. I've found rotten evap hoses and replaced most hoses now, over the years. I'll typically get the code, check and find a rotting rubber hose somewhere or a couple of times it's been a loose gas cap. I make sure and twist the clicking gas cap 5-6 times to make sure it seals. Funny thing is I got the code today... Coincidence??? hahaha I'll be checking the hoses/gas cap tomorrow, ...again!
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post #19 of 19 (permalink) Old 07-20-2019, 11:24 AM
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I took the camera with me to the garage, and looked through the hoses and didn't see where that repair was made many years ago. Then, the camera battery was dead as well...I'll have to try again later when I have power for the camera.
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