Question about 1988 Nissan 300ZX

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Engine will only do 700 rpms

Have a 84 nissan 300zx engine will not rev up motor will only idle for short time real hard to start, good fuel psi

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Check the mass airflow sensor

Posted on Jul 21, 2009

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As long as you have fuel pressure and good fire on the ignition system. When you try and give it the gass to rev it up do you hear a wooshing sound from the exaust at all, kind of like it is plugged up. If so replace the catylitic converter, it is plugged up. The exaust manifold will get red hot if you run it for too long also. If it is not plugged up, then I would spend the money and pull the valve cover and see if you have a rounded cam lobe on one of the intake or exaust valves. This keeps the gases from getting out of the motor and holds it back. Sometimes it will also backfire thru the carburator when trying to accelerate the motor. Good luck, RAC

Posted on Apr 14, 2009

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