Engine Performance problem
2000 Nissan Sentra 4 cyl Two Wheel Drive Automatic 90,000 miles
Car will start but will not idle right. Starts to stumble then quits. When it starts it will not move with out stalling nor can you revit up. I have installed new pump and fuel pressue regulator. Removed injectors and blew them out with compressed air. Pressure at idle is 34 psi and it increases to 45 if you remove the vacuum line from the fuel regulator. If you partially restict the fuel return line and bring the pressure up to 55 psi the engine works much better but still not perfect. Would it possibly be the coolant sensor or the mat sensor?
have the same problem?
Monday, December 21st, 2009 AT 5:32 PM