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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Tue, Sep-12-2017, 03:00:26 AM   #11
ReturnToS54
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Default Re: Fuel smell near passenger rear well with car parked. No drip.

Which, if combined with a bad gas cap, makes sense then as to why the smell outside the car is particularly noticeable after hard driving. (Forced out of the tank and up the filler neck) Hopefully a new gas cap addresses the issue.
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Old Tue, Sep-12-2017, 09:33:20 PM   #12
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Default Re: Fuel smell near passenger rear well with car parked. No drip.

You would not get gas going that far up the filler neck unless you overfilled the tank (kept trying to put more gas in after it stopped automatically). Gas where you posted is normal after a fill up. It gets trapped between the gas cap and the flapper indicating your gas cap is sealing fine.
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Old Wed, Sep-13-2017, 11:52:37 AM   #13
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Default Re: Fuel smell near passenger rear well with car parked. No drip.

I had gas leaking past the cap in hard left turns during autocross. Turned out to be evap purge solenoid located in the engine bay.
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Old Wed, Sep-13-2017, 06:50:23 PM   #14
Jrrrrrrr
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Default Re: Fuel smell near passenger rear well with car parked. No drip.

This point seems obvious, but hasn't been mentioned: are there any set or pending codes for a large or small leak, fuel-tank pressure sender, purge, or vent valves? I say this because the liquid-vapor condensation tank is right there in the right rear wheelwell, and being plastic, it is known to crack at the seems or suffer from broken line fittings. Such a problem would throw leak codes and probably a code for the pressure sender.

I am inclined to agree that even though it seems relatively implausible, if there are no evaporative system codes present, the problem would have to be fuel or condensed fuel vapors leaking up the filler neck and past the gas cap.
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Old Wed, Sep-13-2017, 08:46:34 PM   #15
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Default Re: Fuel smell near passenger rear well with car parked. No drip.

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Originally Posted by Jrrrrrrr View Post
This point seems obvious, but hasn't been mentioned: are there any set or pending codes for a large or small leak, fuel-tank pressure sender, purge, or vent valves? I say this because the liquid-vapor condensation tank is right there in the right rear wheelwell, and being plastic, it is known to crack at the seems or suffer from broken line fittings. Such a problem would throw leak codes and probably a code for the pressure sender.

I am inclined to agree that even though it seems relatively implausible, if there are no evaporative system codes present, the problem would have to be fuel or condensed fuel vapors leaking up the filler neck and past the gas cap.
No check engine light. Do you think it would be worthwhile to get a code reader, or would these codes cause the CEL to definitely appear?
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Discussing Fuel smell near passenger rear well with car parked. No drip. in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)