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Old 05-07-2016, 05:13 PM
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ZJ V8 gas vapor smell

93 Grand Cherokee V8 - I occasionally have a gas vapor smell in the passenger compartment. I have replaced the evap canister purge valve but it did not fix the smell. When smell occurs, I open the gas cap and there seems to be an excessive amount of pressure in the tank. I can't smell gas anywhere out side or underneath the Jeep, just in the passenger area. Should I replace the charcoal canister next?

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Old 05-09-2016, 09:35 AM
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Re: ZJ V8 gas vapor smell

The EVAP system uses vacuum from the inlet and thus creates an underpressure in the tank.
Do you smell the gas while driving, or only when standing still? Any difference with blower on or off? Did you check for any effidence of a leak under the hood and under the jeep?
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Old 05-16-2016, 01:49 PM
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Re: ZJ V8 gas vapor smell

The gas smell occurs while it's running, traveling down the road. It does not seem to matter if the HVAC blower is on or off. Windows were up on each occurrence.
I found a clogged line from the tank to the vapor canister (it was clogged with white crystalline powder). I was going to replace the canister but it has been discontinued everyplace I checked. Yes, rockauto.com shows it as available but when you to check-out they say sorry this part has been discontinued and has been removed from your cart. I found the same thing everywhere I looked. The dealership told me it had been discontinued too and no new super-ceded part number.
So I inspected and cleaned my original canister and put it back in. I sure hope it was the clogged line that was the culprit.
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