Does anyone know how to fix a Mass Air Flow Sensor????

[dany10boy]

I'm thinking no one will but I think it's worth a shot to ask and yes I've searched. I don't want to buy a used one because it could go bad any time and a new one is over 300 bucks.

 

[DarkAngel]

Curious to what exactly is wrong with it like internals or casing.

 

[dany10boy]

Soaked it going through a puddle. Pre owner took out the splash guard. It's gotta be a simple fix if you can solder. Referring to Mafs in general.

 

[BRIAN_MP5T]

Yes, you fix it by getting a replacement


It is a calibrated sensor, if it has been altered, you throw it out.

This part is directly responsible for air fuel ratio and fuel economy.

Go to a scrap yard and buy a couple for $50

 

[dany10boy]

Care to share your insight Brian? If you just throw em out, why are remanufactured ones on the market?

 

[BRIAN_MP5T]

They are calibrated to provide a set voltage for a particular velocity of air

The ECU uses this minor variance in voltage to decide how much fuel to add to the air for a clean effective combustion.

With my experience tuning my car over the years, I am actually still shocked how little of a change in fuel volume is required to throw the AFR off from " Good " to " Not Tuned "

Knowing how precise this device has to be, it should be treated like a glass jar of nitro explosives IMO

Cleaned with light spray, dried with low pressure air, etc...

Any abuse would make the car run permenantly poorly.

Aftermarket Refurbs should be fine, they would be more likely to be in good shape than one from a scrap yard,which is why I said get two or three. Trial and error you see..

 

[StealthWyvern]

Just go buy a new one for about 180 bucks....

 

[dany10boy]

thanks for sharing your experience Brian.

 

[BRIAN_MP5T]

Roger

 

[pasadena_commut]

Soaked it going through a puddle. Pre owner took out the splash guard. It's gotta be a simple fix if you can solder. Referring to Mafs in general.

Did you try cleaning it? It might just be dirty from the muck in the water. MAF cleaner is very volatile and leaves no residue. It has been a while since I bought any but it can't be more than $10 or so for a can.

 

[dany10boy]

Yeah I tested it, it was toast. Now I can start the car but still have some issues that I'm looking into. No mil light but it wants to and sometimes does stall after start up while hot or cold. Takes up to five minutes for it to run normal enough to drive. Looking into fuel pump/ strainer/filter or maybe bad FPR. Fuel pressure reg's vacuum line smells a little of fuel so maybe the diaphragm is leaking. Also a small exhaust leak after 1st o2 and before 2nd o2. Going to have that wielded up asap.

 

[dany10boy]

I'll have to look up the fuel pressure specs so I can test the fuel pumps pressure as well.