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qbm 4/22/2010
1987 Nissan 300ZX 2+2 6 Cyl 3.0L - Engine
idle drop and stall, not fuel pump or regulator, what is it
will start and idle for 3-5 mins, idle drops off and almost stalls. idle air bypass valve is working, tested fuel pressure and is good at all times even when stalled. fuel pressure regulator works but if fuel pressure increased by pinching return line car runs fine. remember fuel pressure is at spec when stalling, needs to add 40-60 lbs beyond spec to run.
2 Answers
  • newkidintown
    newkidintown 7/3/2010
    try replacing the fuel fiter
  • sergio
    sergio 8/6/2010
    I would also recommend replacing the fuel filter and also check for dry rot on fuel lines. check to see if you smell gas under your hood near the fuel filter. I would also check under car following lines away from fuel tank towards front of car for damage.

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