Hello all my name is: James
I have a: (GTO TT)
It has the following issue: some of you may have seen my post on the GTOUK forum and I’m looking for ideas to solve a strange problem.
So I refurbished the rear underside of the car and put a new Stock TT fuel pump and all new rubber hoses on the fuel tank. The rear section of the exhaust was still off the car ( the back box part) I put fresh fuel in and she started up and was idling happy with no leaks or noises.
The following day I finished putting the car back together rear exhaust and bumper etc… she struggled to start and idled very lumpy and popping a little. So I turned it off - I went back later and she was very hard to start then you can give it a little throttle but this doesn’t help and the car runs for a few seconds and drops back down in revs from 2 - 3k and then dies…
The electric parts (plugs, leads, coils, PTU) are all new i think it probably an air/ fuel thing. But looking for ideas/ suggestions.
Cheers
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Hi James, you describe the problem as being hard to start, lumpy and popping. Those were the same things I was getting when a mechanic fitted a timing belt kit in my car and it had skipped a few teeth, probably not your problem and maybe you’ve already checked but worth a look maybe.
Have you connected your fuel return and vapour hoses correctly? If you’ve undone the rear end and replaced hoses it’s possible to mix those two connections?
I double checked that - I’m leaning to the fuel pump not 100% seated in the tank - and leaking internally into the tank causing low fuel pressure and or low fuel supply. It’s a stock pump on stock sender but have another complete sender unit that I’m going to swap back in and see what happens- just need to get back under the car!
You could detach the pipe that goes into the rail into a a bottle and crank it and see how quickly fills it up it should give you an idea then saves you removing all the pump from the tank,should fill a 2 lt bottle fairly quick
Issue resolved- swapped the old fuel pump assembly back into the tank and she fired right up. So suspect it was not fitted/ sealed right inside the tank so loss of fuel and pressure.
Morale of the story when it stops working after you’ve been playing with it - start from the last thing you did
