Trying to save or rebuild a afm

[JStoked]

I have 4 bad afms one i got wet not seeing why was not due to me. The other 3 are ones I picked up along the way. So this gets me to my point. They are all bad ohm checked them. None of the checked out to tsrm specs. So I pulled the one that got wet apart and have it setting on the heater to dry it out slowly but surely. Will this work?? And I really don't have the cash to spend 600 on a new one. So jj can I rebuild these? I know you have saved a few before so any info would be great.

 

[jetjock]

Some can be saved, some can't. Depends on what's wrong. In that case you might get lucky by putting it in an oven at 150 degrees for an hour. If that fails just buy a used one. There are plenty around and even if you get a couple of bad ones they will in total be a lot cheaper than new.

Fwiw 80% of the claimed bad AFMs I've tested were good. Their owners were either barking up the wrong tree or didn't know how to check them. Resistance testing is the least effective method and must be done with respect to polarity, something shown in the book but often not understood by those who try it. Myself, I never use that method.

 

[JStoked]

Thank you sir the oven thing did it. And what would you say the best way to check them would be?

There reason I ask is becuse you were right I had a bad ground on my neo. But i checked all the afm's with two diffarent mult meters.

 

[jetjock]

Glad it worked out. Could be you were testing them incorrectly. Again, polarity is important.

I test them either on the car or off by duplicating the conditions they run under. Power supply, scope, airflow source (muffin fan or vacuum cleaner) and a thermal anemometer that's similar to a MAF sensor.