General Stock MAF sensor issues.

[Nathan Jorgenson]

On my bone stock 1990 Plymouth Laser RS I ran into an issue with the MAF. The car surges and runs stupid rich with the MAF sensor plugged in to the harness but when un-plugged it runs way better.

What is the proper way to diagnose a Karman vortex MAF?
Can I clean it like a heated wire MAF?
Please help me!

You must be logged in to view this image or video.

 

[Spleen8urLSX]

These maf sensors can’t be cleaned, that response says the maf is likely bad. As cheap as 1g maf’s are I’d source another one and see what happens but sounds as if it’s no good.

 

[jdxnc]

Check the coolant temp sensor wiring, this can cause the car to run stupid rich and better with the MAF unplugged too.

 

[Spleen8urLSX]

Didn’t even think of the coolant temp sensor! I ran into that 10 years ago when I bought my 1gb, same deal. Is the check engine light on when the maf is plugged in?

 

[Nathan Jorgenson]

The check engine light is not on when the maf is plugged in. I'll have to check the coolant temp sensor and wiring.