Fuel Leak

[Alamoe]

Hi Guys

After driving my R32 GTR i park it in the garage, The next day when i start it up fuel will leak from under the engine (not sure exactly where.) After about 2 mins it will stop and not leak all day until i drive it the next day. to make things more interesting it doesnt do it every time

any ideas would be greatly appreicated

Thanks

[Trozzle]

That, I must say, is bloody weird.

No idea here sorry, doesn't make sense that it wouldn't do it every time...although I'd remove and refit the fuel filter as well as consider getting someone else to turn the key each time you go to start the car while you stick your head underneath or into the engine bay while it primes.

[DVS JEZ]

does it only happen with a full tank? i have heard of the carbon canisters syphoning fuel out of the tank, never seen it myself but been told.

can you see anywhere that its leaking from?

[Alamoe]

does it only happen with a full tank? i have heard of the carbon canisters syphoning fuel out of the tank, never seen it myself but been told.

can you see anywhere that its leaking from?

[/

Doesn't seem to matter how much fuel is in the tank and I should probably add most of the time it leaks in the morning the night before I would be driving around on high boost. I can't see exactly where it is leaking from but it's up the front on the drivers side

[Moodles2]

Check for fuel stains around the injectors

[Beer Baron]

there is only a few places it could be coming from if it's in the engine bay. there is basically only feed line to fuel filter, line from fuel filter to fuel rail, the fuel rail and injectors, then the regulator, then return line from the regulator. both the feed line and the return line meet up to hard fuel lines which come from the tank in the rear. it's unlikely any of the hard lines are leaking. check the points where the rubber lines meet up to metal hard lines. so check where the rubber lines meets the fuel filter, check where it meets the fuel rail, check the return line. it's possible one has a split that is leaking intermittently. I've had a car before that had braided fuel lines in the engine bay and it was intermittently leaking fuel. was a bastard of a thing. it would leak for a bit and absolutely piss out fuel. then without touching a thing it would stop and not happen again. had to replace some hoses and it went away.

[Alamoe]

Hey guys

Just an update I have been watching the leak and it only happens when the tank us full. After I drive on hi boost once the car is off I open the fuel cap and relasr the pressure and it has only done it once! No where near as much as it used to

[Beer Baron]

well in that case it's almost certainly the fuel filler neck. under the old compliance scheme(s) cars complied here had to have their normal (big) filler neck fitted with a reducer to our tiny un-leaded size ones. these are often fitted poorly and often leak. you need to remove it and get it re-fitted and sealed properly. it's not a big job and can be done DIY if you like. other option is buy an un-cut filler neck and fit that (even better, it will NEVER leak then).

[N1GTR]

Do you have the part number for that Richard?

[Beer Baron]

sorry mate, don't have the pn. have previously just bought used ones and fitted them. it's so much nicer than one that's had the sealing lip cut off and then replaced with the restrictor. also makes it a shitload easier to fill from jerry cans etc as you have a full size hole. it's no longer a requirement for compliance (thank god) as people finally caught up with the times and realised we haven't had bowser available leaded fuel for about 20 years so making people fit restrictors to prevent them using leaded fuel (which is not available outside of avgas) by accident was just stupid.

someone handy with fast should be able to pull out a part number, failing that the usual guys bringing in wrecks etc may have a spare one. I think around $100 or less for a second hand one is the going rate. little bit of mucking around to fit as they go under the inner guard but not hard.

if you have one that has a suspect seal on it I'd go that route.

[N1GTR]

Thanks-I'll buy a new one and fit that sucker up

[Beer Baron]

yeah it will solve your leaking fuel out of filler neck issue for life! just don't drop shit down the hole as there's no flap any more!