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I would suggest using electronic cleaning solvent for the afm as it is a fairly sensitive hot wire element in it, spray it leave it for 10 min and do it again just to make sure its cleaned properly wait 10 min before driving . It works a treat as I have used it on both of my cars & my sisters atmo R32

Questions:

How far away do you spray from (don't want to damage the element)

Do you only spray the element or the inside of the AFM casing as well?

How do you know when it's clean? Do you shake it around and watch crap fall out?

Depending on how much oil there is in your intake pipe you may wish to spray with your AFM still attached. Generally I just remove the AFM and clean it separately. You can always remove the intake piping and clean it off the car if you want.

Run your finger around the inside of the AFM. If it's oily, then it could probably do with a clean too.

I use CRC Contact Cleaner. Hold it about 15-20cm from the AFM, and spray in the direction that air passes through. May need to give it a few blasts if you have a lot of oil.

Once it dries (about 30 sec) you should be able to run your finger inside and see that it is clean.

You shouldn't see stuff fall out of it. Generally oil will just stick to the element and the inner plastic.

  • 2 weeks later...

Thanks, I've always wondered :D

but wtf is the AFM

Air flow meter - it basically measures how much air passes into your engine. It's the main input for the computer and a hell of a lot of decisions are made based on that input. Basically if you find the air filter in your car and follow the pipe a little back you should see a piece of "pipe" with some flanges on it and a plug coming out of it. That's your AFM.

Don't use Carby Cleaner on the AFM it leaves a residue afterwards. Use Brake Cleaner or Electrical contact cleaner instead.

Do it on the car if you can get to it, just spray the actual senor wire the rest of the assembley doesnt matter.

Weasel the AFM is after the air filter it is a piece of wire and plastic sitting in the middle of the intake pipe. If it gets dirty it can give incorrect readings to the ECU resulting in missfires

What Duncan Said,,,"Brake Cleaner". It's my mechanic in a Can. Cleans AFM's,,,funny enough brakes (removes spilt brake fluid as well as cleaning brake grunge. This stuff SHOULD be in everybodies toolkit.

I even use it to clean up his oil seepage between races.

If you really want to do a test,,,get a clean piece of glass and spray some carby cleaner,brake cleaner and contact cleaner on it, one at a time and you tell me the results.

Neil.

  • 3 weeks later...

haha. when i cleaned my AFM i used CRC contact cleaner. didnt need much, endded up taking it back. scored $20. booya

i cleanded it too much, long story short. my car was running better when the AFM was dirty (as my car was rooted). so for no reason i decided to try dirty it again... used everything i could find under the sun, as long as it was spray-able. however it wouldnt go dirty again.

anyways got my initial problem fixed and now the car runs fine, with my poor attempts to dirty the AFM.... id clean it again if i didnt have to go back to the shop to get a can of cleaner

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