Question about 2000 Ford Focus
The MAF itself is probaly defective. First check if the filament is dirty, and try cleaning it with MAF cleaner in spray bottle. The way MAF works is that air current cools a heated element resulting in lower resistance. This minute change is further amplified by the circuit in the MAF sensor and fed to the computer. I have never tested a MAF sensor, but I can probably test one. Since the engine don't even start I would probably use a fan, and with the ignition in on position I would probe for voltage changes, that changed with the amount of air rushing through it. There should be a supply voltage, a ground, and the rest would be in series with other sensor, then one would be the input to the computer which varies in value with the amount of air going through.
Posted on Jun 28, 2009
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Posted on Jan 02, 2017
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