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testing a mass air flow sensor.


cp2295

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My credo
If you ain't first you're last
I would change the ect then, engine should've acted way differently, but I would wait until someone else chimes in
 


mitch4712

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I changed the ECT sensor and no change. I am going to test the voltage again.
 

mitch4712

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Ok so I finally had time to look at the truck again. The voltage was the same as before. With the connector plugged in the voltage on the green/red wire was .63. And the gray/red was .06. With the connector unplugged the voltage was 4.7 on the green/red wire and 0 on the gray/red wire. Any suggestions? I bought a $16 masterpro brand ECT from oriellys auto parts.
 
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mitch4712

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jimbone

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If your MAF isn't working the ecu will throw a CEL and you engine may run like shit. If it's just dirty it will just get crap mileage. Soak the mesh or sense rods in white vinegar to clean it
 

mitch4712

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I cleaned the MAF awhile back. It didnt make any difference. im getting around 23MPG.
it weird. when I start it when its cold it runs fine for about 30 seconds then startes to miss. It also has a hestitation till it warms up. after the engine is warm the hesitation is gone but it still vibrates at idle. Ive changed the plugs, wires, dist. cap & rotor, ECT sensor. I replaced a few vacuum hoses. Ive tested the ECT sensor, TPS, and MAF. last but not least I have cleaned the IAC valve. idk what to check next. I thought about doing a smoke test to see it maybe the intake gasket it leaking.
 

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