Maf resistance values

[jaycin]

MAF has triggered the CEL again but the 93 XLT runs OK when disconnected. I cleaned the MAF and reinstalled but the truck runs rough if I keep the MAF connected. I measured the ohmic value across the the actual posts where the elements are located and they read about 22 ohms each. But when I measure the resistance at the connector I get no reading. I would appreciate some input why this is so. I would expect the identical reading there as that is what the ECU would see.

 

[Roadrunner777]

This site has the best diagnostics I have found for the MAF. One think to understand is that the MAF is an electronics package that outputs voltage based on airflow.

http://easyautodiagnostics.com/ford_maf/maf_sensor_ford_1.php

 

[jaycin]

This site has the best diagnostics I have found for the MAF. One think to understand is that the MAF is an electronics package that outputs voltage based on airflow.

http://easyautodiagnostics.com/ford_maf/maf_sensor_ford_1.php

Thanks Roadrunner. Great info re the MAF and how it works. My MAF looks clean but I'm going to reclean it again. I'll probably get a can of MAF cleaner at Walmart, but I'd like your opinion about isopropal alcohol. I have 70% strength here at home. Should I use it or not? I value your judgement.

 

[Roadrunner777]

I do not recommend 70%, too much water. If you find MAF at walmart, you have a better store than mine, I only found it at Orielly's. MAF cleaner is first choice, then electronic contact cleaner, then, the highest strength alcohol you can find.

I was pretty obsessive about cleaning my MAF because I have a USB computer microscope and at magnification, it looked extra dirty. Ultimately, I used MAF cleaner, and a very small stiff artist's paintbrush to scrub the crud off.

But, unless it is grossly dirty, I don't think the elements are the issue. Did you check 12v, ground and signal?

 

[jaycin]

I do not recommend 70%, too much water. If you find MAF at walmart, you have a better store than mine, I only found it at Orielly's. MAF cleaner is first choice, then electronic contact cleaner, then, the highest strength alcohol you can find.

I was pretty obsessive about cleaning my MAF because I have a USB computer microscope and at magnification, it looked extra dirty. Ultimately, I used MAF cleaner, and a very small stiff artist's paintbrush to scrub the crud off.

But, unless it is grossly dirty, I don't think the elements are the issue. Did you check 12v, ground and signal?

No. I plan to reclean first and then do the probing.