TwinTurbo.NET: Nissan 300ZX forum - Mine Used To Bleed Off Instantly, But Fixed It
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Subject Mine Used To Bleed Off Instantly, But Fixed It
     
Posted by nzryan on November 17, 2017 at 4:30 PM
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In Reply To Right now mine bleeds off instantly after I shut it off (n/m) posted by compirate on November 17, 2017 at 11:12 AM
     
Message Mine used to bleed off instantly like that, but I fixed it a few years ago, in my case (and quite often for others too), its a leak on the fuel pump assembly in the tank - so very easy to miss.
The little 1-2 inch fuel hose that goes from the pump output to the top section hard pipe leaks (its only got compression clamps on it and as the hose /clamps age, they get looser, so the high pressure fuel leaks out the joins and back down into the fuel tank - so you don't see it).
In my case just put new hose on and used worm drive clamps, never had a problem with it since, and the Z seems way better and more consistent in its power delivery ever since.
I certainly recommended changing that hose/clamps even as a precaution if it's original, these cars are getting old now.

     
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