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  • 3 weeks later...
  • Member
  • Member For: 10y 11m 20d
  • Gender: Male
  • Location: Australia

Yeah car is going great, I know why my throttle felt like sh*t as well, there was a tear in the the fuel line from the pump to the tank outlet, so fuel pressure was fluctuating and causing the car to lean out and do weird sh*t. They replaced the pump and lines so all of that is fixed now.

Car drives better than it did stock and the midrange torque is nothing short of stupid, though since I put another muffler in to quieten it down sometimes it is hard to start when hot, this was an issue when it was stock (every hot start would crank for ages) which went away after the tune, though since the muffler it happens maybe 1/4 times when starting hot. You stop, restart and it starts instantly.

Is this a problem that anyone has seen before?

Edited by rollex
  • Donating Members
  • Member For: 21y 8m 25d
  • Gender: Male
  • Location: Townsville

Only with the PW surge tank so I had on my BA turbo. It would take longer to start but otherwise I'd think it's a small priming problem in the fuel line somewhere letting pressure drop out of the line to from the pump to the fuel rail? Tried looking at the stock fuel pressure regulator?

  • Member
  • Member For: 10y 11m 20d
  • Gender: Male
  • Location: Australia

What about the stock fuel pressure regulator? If I prime the engine twice it starts first go every time.

  • ...JD TUNING ADELAIDE...
  • Gold Donating Members
  • Member For: 16y 11m 28d
  • Gender: Male
  • Location: Adelaide

Either that or you have a split again on the intank hose

  • Member
  • Member For: 10y 11m 20d
  • Gender: Male
  • Location: Australia

Why would it only happen sometimes and never when cold?

Fuel filter and plugs are brand new. They also checked all the lines and did a pressure test after putting the pump in to make sure there were no leaks, it is possible there could be a leak now but surely if there was the issue would be consistent.

  • ...JD TUNING ADELAIDE...
  • Gold Donating Members
  • Member For: 16y 11m 28d
  • Gender: Male
  • Location: Adelaide

Your issue follows those two common faults but not limited to them

  • Donating Members
  • Member For: 21y 8m 25d
  • Gender: Male
  • Location: Townsville

Maybe buy a check valve (one way valve, can't think of any other name!) and put that on the soft line after the fuel filter and before the fuel rail? My BA took longer to start after installing the surge tank but a mates FG with identical setup started easier so....

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