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Old 09-14-2011, 05:58 AM   #4
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Join Date: Apr 2006
Location: Boston, MA
Posts: 221
Quote:
Originally Posted by spongebob
Forgot to mention but it is a 2,7 2000 Motronic 7,2.Not sure if it is exactly the same as 5,2. But anyway I see a connection here, if the MAF is faulty it might cause the engine to run either lean or rich and then this is corrected by the o2 sensors.Codes does not always point you in the correct direction.Seems strange as one range seems to be running lean and the other running rich. Not skilled enough though to understand all data that can be collected by the OBD prt

Sent you a PM. In the meantime, use your Durametric tool and measure the MAF voltage at ignition on and engine off -- should be 0.9 - 1.1 volts; with engine idling, the voltage should be approx 1.4 volts.

I don't know about the earlier MAF sensors but the newer ones also measure intake air temperature.

Regards,
paul...
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