1992 Nissan Maxima POOR GAS MILEAGE

1992 NISSAN MAXIMA
185,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JBULLARD1905
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  • 1 POST
The car has no power and is getting poor fuel mileage. The front middle cylinder is not firing. I have changed the timing belt, spark plugs, sparkplug wires, and the fuel injector. I put a hose up against the changed fuel injector and could hear it clicking. The exaust has a strong odor of raw fuel. When taking off from a stop. the car has trouble taking off. You can hear it backfiring in the intake. We checked the compression and it checked around 160 psi.
Feb 8, 2009 at 2:39 PM
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RASMATAZ
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  • 75,992 POSTS
Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.
Feb 8, 2009 at 3:42 PM