Question about 1990 Nissan 300ZX

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300zx non turbo 1990

Thancks for your answer, we did the test befor, and it dint change nothing
the problem is intermittent and when i press the gaz pedeal it come back to normal

tancks again for your answer

karl

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Sounds like maybe there's a fueling problem that could have to do with the fuel pressure regulator. It's near the balance tube (the pipe that goes across from one side of the manifold to the other). There should be a vacuum reference for it, in the form of a hose from the manifold to the FPR. Make sure that's intact. If it is, you might want to get a new FPR and see if that helps you out. If it's screwed up, the vacuum at idle may not be enough to allow it to function properly.

Posted on Jul 30, 2008

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