Aftermarket Air Sensor?

[MUHSFINK]

So I took my 2008 GMC Sierra in for a basic oil change (got Mobil-1 syn.) and the tech pulled the codes and said that I had a "aftermarket air sensor" and that it had failed and that I had dirt in the intake. He said that it wasn't a problem in terms of reliability but it does seem to be a bit quieter. I also have the GMPP air intake. Even with this mod it feels a bit more refined than before. I also had a very hard shift from 1-2 and since they replaced the sensor the lurch is basically gone. Overall I love it but i was curious if anybody had heard of any type of aftermarket air sensor. I always thought that those were pretty much untouchable...

 

 

Cheers

[DwayneJ]

Mass Airflow Sensor(MAF)?

 

If so the aftermarket ones are garbage.

 

There is also an Air Intake Temp sensor(IAT)

[MUHSFINK]

Mass Airflow Sensor(MAF)?

 

If so the aftermarket ones are garbage.

 

There is also an Air Intake Temp sensor(IAT)

 

 

yeah it was a MAF.

why would anybody ever do that???

[DwayneJ]

Aftermarket MAFs lie to the pcm about airflow, they are a bad thing. For LESS money you can reprogram the pcm to do what you want instead of trying to change it's commands by missreporting information to it.

[MUHSFINK]

I'm thinking it might be blackbear time!

The truck seemed to have much more intake noise with the junk aftermarket sensor. But it drives wayyy smoother.