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Old 01-08-2013, 10:13 PM
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Yorgi Yorgi is offline
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Location: Toronto
Join Date: Mar 2005
Posts: 3,650
Mein Auto: '04 M3 / '06 650i Cab
Originally Posted by 645/333 View Post
Hi! Many thanks for the information, knowledge increased! If you did have a lower pressure in the tank due to the cap being faulty, how would that manifest in terms of driving the car? I appreciate a code is generated and the smell of fuel may also be an indicator, I have seen many cars with fuel stains running down from the fuel tank filler cap, indicating a less than tight seal, but would the cars ie 6 series run properly???? Would you get fuel starvation as it is not being pumped effectively?????
Pressure is strictly for emissions. The fuel pump will work even if the cap is removed.

The cap would have to be pretty bad combined with some real hooligan driving to have fuel/petrol leak out of a closed cap. I think what you are seeing is people over-filling at the pump or pulling the nozzle out too quickly (get your mind out of the gutter ) after they stop pumping which causes a spill down the side of the car.
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater

Last edited by Yorgi; 01-08-2013 at 10:15 PM.
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