PC-85-928S

has anyone ever used a aerosal mass air flow sensor cleaner?

http://www.autobarn.net/maairflsecl1.html

Rob Edwards

Yes, on my GT when I got it, after removing the K&N filter. No idea whether it helped, but it didn't hurt.

PC-85-928S

just a spray on application?

Rob Edwards

Remove MAF from car, hold over a stack of paper towels, hose down the venturi- tube-looking thing and the hot wires for a couple of seconds, let it dry, re-install. Not too close with the spray, the wires are pretty fine....

MarkRobinson

My best friend has been "restoring" his Ferrari F355 for 8 years now, battling little issues here/there causing the car to run funny including: swapping MAF's, rebuilding injectors, replacing coil packs & wires, plugs, sensors, EVERY Single electrical connector in his twin-EFI engine bay (two ecus, wiring harnesses, dual sensors as one bank of the V8 is controlled by one EFI system, the other by the other).
Tubi headers/exhaust/cats, FAST dual wide-band monitoring, everything trying to rule out bad/defective components.

On a whim last week, he took a can of RB (sp?) MAF cleaner, cleaned both MAF's and ALL of his remaining issues were gone! He's amazed.

dr bob

^^^ What Rob said. MAF --MUST-- be removed. The cleaner spray sits in the intake belly and makes the car pretty hard to start. I tried to cheat and found out the hard way.

danglerb

I've used it, but didn't notice anything dramatic.

PC-85-928S

i read somewhere to use electrical contact cleaner
I wonder if it is the same thing.
http://www.ebay.com/itm/CRC-QD-Elect...item35b9a68a1b

Rob Edwards

It -might- be, but the MAF cleaner is cheaper. I don't see any reason to second-guess the solvent manufacturers' choice of what they put in the MAF cleaner spray can....

Randy V

You shouldn't see much improvement with our MAFs as the hot wire function burns off all impurities that may accumulate.

soupcan

One of the few things in a can I have used that works, we now stock it in the shop. It is not the same as contact cleaner, carb choke cleaner. Use as described above, MAF off.

dr bob

There are plastic bits that hold the wires in there that do not do well with carb/choke/brake/electrical contact cleaners. Stick with the right stuff and be safer. IIRC, Wal-Mart sells the CRC-branded version of the MAF cleaner.

hacker-pschorr

Not true.

Twice on the dyno we had perfectly good running, stock S4's there were running too rich. Both times fixed by simply cleaning the MAF.

Once time in-situ since the owner of the car did not want too remove more than the airbox. I handed him the can and said: "have a it".

Problem sloved & should be on the to-do list for regular maintaince.

123quattro

It is a problem on hot wire MAFs. They get crudded up and that insulates the wire giving incorrect readings. Also a problem on BMWs. Not so much on Audis as they fail fast enough they don't have a chance to go bad (at least on my A6).

911SLOW

Yes and it works great.