MogLite Posted December 9, 2005 Share Posted December 9, 2005 Well my 3.9 EFI has got this fuel leak. Symptoms are, doesn't leak when stationary with engine off Doesn't leak as engine starts and runs Starts leaking from the tank area about 45 secs after the engine starts I'm therefore guessing its the return for the EFI where it enters the tank. I'm kinda hoping I can lift the rear carpet, pop the fuel pump cover and uncover a perished pipe, loose connection, broken fitting. Is this a common fault ? Anything else I need to look out for ? I've sold the car and the geezer wants to collect tomorrow !! I've got a spare tank and pump, but I don't want to drop the tank if I can help it Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted December 9, 2005 Share Posted December 9, 2005 Andy, Sounds more poss like the return pipe connection to the tank, the system runs approx 30+ PSI, so could be just a clip worked loose ! One way to check is to remove the retun pipe from the Engine (after the PRV) and into a bucket, so the reutn pipe is taken out of the equation, if it still leaks then its something else Nige Quote Link to comment Share on other sites More sharing options...
MogLite Posted December 9, 2005 Author Share Posted December 9, 2005 Andy,Sounds more poss like the return pipe connection to the tank, the system runs approx 30+ PSI, so could be just a clip worked loose ! One way to check is to remove the retun pipe from the Engine (after the PRV) and into a bucket, so the reutn pipe is taken out of the equation, if it still leaks then its something else Nige Yeah that sounds easy - like your style - as it will be by MagLite tonight. Thanks Quote Link to comment Share on other sites More sharing options...
BogMonster Posted December 9, 2005 Share Posted December 9, 2005 I have seen (on a 200Tdi Disco not a V8 RR but the same fault is still possible) a perforated pipe (due to corrosion) in the tank unit where it comes out the top of the tank, could be that causing a leak, either pressure or return could do it I guess. Just needed a new tank pickup. Accessible through the hole in the floor, if there is one. The pickup sits in a depression in the top of the tank and all sorts of cr*p builds up around it which if it is salty can cause corrosion. This is assuming the pickup is steel like a Tdi one and not plastic, in which case rust is unlikely Quote Link to comment Share on other sites More sharing options...
bishbosh Posted December 9, 2005 Share Posted December 9, 2005 You wont like this Andy, but my money is on one of the metal pipes coming out of the pump - from your description I'd agree on the return side. The pipes are fragile and tend to fracture eventually . Hope I am wrong and it's just a loose fitting! Quote Link to comment Share on other sites More sharing options...
GBMUD Posted December 9, 2005 Share Posted December 9, 2005 Had a 200Tdi do just the same thing. Discos have a hatch in the boot floor for getting to it, not sure RRs do. Nick just cut a hole in the rear floor to get access to his - suggest you do not use an angle grinder for this! Once all the sound proofing and carpet are back down your man will not know the difference until he goes deep wading. Halfrauds sell 2-part putty which works quite well for sealing fuel tanks. Make sure it is well degreased first - should take care of that itself - and the putty sets in minutes. Works for diesel so it should be fine in a petrol environment. Good luck Chris Quote Link to comment Share on other sites More sharing options...
MogLite Posted December 9, 2005 Author Share Posted December 9, 2005 Thanks for all the pointers There was indeed a hatch in the boot floor Stupid previous owner/mechanic had extended the return line by 2" with a joiner and a 2" piece of pipe. That little 2" piece of pipe had gone porous and was p155ing out fuel. Taking some of the slack from the return line, gave me ability to join the hose back to the pump - why the hell didn't they do that ? Muppets Quote Link to comment Share on other sites More sharing options...
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