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Registered User
Join Date: Feb 2011
Posts: 2
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Over fueling engine
I have a BMW 320i 1989. The engine runs fine but is using too much fuel. The Mass Air Sensor cannot be adjusted to give normal readings for the CO and hydrocarbon levels. I have replaced the Mass Air Sensor, the Fuel Pressure Regulator and the Coolant Temperature Sensor. I have cleaned the Throttle Body and examined for leaks in the various rubber boots on the air intake without finding any.
What else should I look at? |
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03-08-2011, 10:00 AM
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bostongrun
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A bad O2 sensor can cause a rich condition i.e. using too much fuel. Usually they trigger a CEL however, with the older OB1 cars the lights don't come on as easy as they do with the OB2 cars. FYI, a bad mass airflow sensor and vacume leaks usually are associated with a lean condition. The fuel pressure regulator is usually associated with hard starting excessive cranking.
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03-08-2011, 07:57 PM
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