Mechanics

MASS AIR FLOW SENSOR

1994 Nissan Quest • 6 cylinder FWD Automatic • 111,000 miles

I have black smoke comming from tailpipe I have changed the mass air flow sensor, did a wire check, changed disribater cap and button, new spark plugs, wires. But when the sensor is pluged up it is running rich. When it is unpluged car runs fine. Any ideas on what I might have missed
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Dogsareyou79
August 6, 2011.




Most likely a faulty Crankshaft position sensor inside DIST.
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Docfixit
Aug 6, 2011.
Had that check keep getting a code 12 mass air flow short

Tiny
Dogsareyou79
Aug 6, 2011.
You have a problem in the Mass Air Flow circuit but not necessarily the sensor itself. It could be any of the related wiring or the computer itself. It needs to be troubleshooted by a technician.

Wrenchtech
Aug 6, 2011.
Thats what I was thinking but I hoped it was something simple

Tiny
Dogsareyou79
Aug 6, 2011.
What happened

Docfixit
Aug 10, 2011.

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