Rinus Posted May 28, 2011 Share Posted May 28, 2011 He there, strange problem; When driving the car for half an hour and then put the ignition off, I can hear very loud the air blowing out of my fuel tank, I'm shore it's not vacuum cause you can smell the fuel vapour coming out... I did the 12v fuel pump mod and have a bosch044 in tank pump, 650cc sard-injectors, stock fuellines and rail... Anyone an idea what is causing this? cheers Link to comment Share on other sites More sharing options...
Wez Posted May 28, 2011 Share Posted May 28, 2011 Was it low on fuel? Link to comment Share on other sites More sharing options...
David P Posted May 28, 2011 Share Posted May 28, 2011 Has the charcoal cannister been removed? Link to comment Share on other sites More sharing options...
Rinus Posted May 28, 2011 Author Share Posted May 28, 2011 It happens with full tank and low tank... Charcoal hasn't been removed.. Link to comment Share on other sites More sharing options...
David P Posted May 28, 2011 Share Posted May 28, 2011 The fuel cap is also a 2psi pressure release valve. Link to comment Share on other sites More sharing options...
Rinus Posted May 28, 2011 Author Share Posted May 28, 2011 Ok thats good to know that the cap opens at 2psi... But when it was stock it didin't build pressure, only vacuum I believed. When at the gasstation opening the cap, you could here it suck the air into the tank and never heard any air blowing out of the tank (stock fuelling) Is this pressure normal then, are there more people who has this issue? Link to comment Share on other sites More sharing options...
David P Posted May 28, 2011 Share Posted May 28, 2011 Always pressure. Link to comment Share on other sites More sharing options...
Rinus Posted May 28, 2011 Author Share Posted May 28, 2011 Ok and cause of the bigger pump more pressure... Link to comment Share on other sites More sharing options...
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