5 replies to this topic

[maccers]

I have a retro fitted injection system on my 1293cc. Am using a standard MPI fuel tank, with correct non vented cap. I know fuel does expand more so in the recent hot weather we are getting at last.

 

Is it normal that when the fuel cap is removed there is a release of that pressure? I've not run the car for about 3 weeks, so any pressure is just what is being built up with the fuel sitting there, ie np pressure from internal pump.

 

 

[rally515]

There should be a vent at the top of the tank to stop this, accessable from the boot but quite tight in there

[maccers]

Yep, there is and I have routed that pipe to the same hole as my old vented tank used to just below the boot floor outside the car. May be blocked?

[jaydee]

Check that the vent pipe is not blocked, it may happen causing the whoosh as you open the filler cap.

[rally515]

If pressure is building up it suggests that yeah haha

[maccers]

Cheers fellas, will do!