I need real help guys. I been getting this code for about three weeks. The Haynes manual says it is a Mass Air Flow Sensor (high). So I changed MAf it didnt fix it. ALso I have changed two relays, checked fuel pressure,did a complete tune up, adjusted throttle body, checked fuel injectors, even put it on a computer and still cant figure out what is wrong with it. I think I have two choices. to change the car to speed Density or re-wire the whole car. My car is a 87 Iroc 305 tuned Port. Someone please help me.

 

Did you put a new MAF on or swap out with a used unit or one of your buddies units?

Clean connections to the MAF and relay connectors. Check the air connections Air Cleaner to MAF to Airbox to Bellows to Throttle Body for leaks.

Make sure your TPS voltage is at .54

Did you disconnect battery after swapping components to clear codes then re-connect and check?

 

We need a little more info. Is it a con't code or intermittant? If intermittant; under what conditions does it set? If con't-have you checked the output voltage from the maf and at the ecm?



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