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Any DIY for removing MAF's?

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Old Jan 21, 2012 | 11:49 AM
  #1  
peh-amg's Avatar
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'13 Audi RS5
Any DIY for removing MAF's?

Anyone have a DIY or instructions for removing MAF's? I'm having trouble figuring out how to disconnect the electrical connection (don't want to break it) and also remove the two steel clips that hold the MAF's in place.
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Old Jan 21, 2012 | 02:23 PM
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Why are u removing them? I remember they are hard to get out. I have to force it with a small screw driver.
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Old Jan 21, 2012 | 02:32 PM
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I want to clean them.
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Old Jan 21, 2012 | 03:54 PM
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Id just leave them alone, unless they needed to be cleaned...But your car is brand new.
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Old Jan 21, 2012 | 04:58 PM
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Originally Posted by Merc63
Id just leave them alone, unless they needed to be cleaned...But your car is brand new.

I've been getting a hesitation/misfire but no CEL and I've got K&N's so thought I would clean them. I just removed the airbox lid, left the MAF's mounted and sprayed them with CRC MAF cleaner. I'll see if this helps.

FYI - car doesn't throw a CEL so my dealer has no idea what to do. Car hestitates when cold.
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Old Jan 21, 2012 | 05:53 PM
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Lol its so funny, they can't fix anything unless the computer tells them what is wrong.. I guess that's what we get for relying on electronics to control everything...

I have heard of the oil from the K&Ns coating the MAFs. Did cleaning them fix it?

Have you checked your plugs?
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Old Jan 21, 2012 | 09:05 PM
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Originally Posted by Merc63
Lol its so funny, they can't fix anything unless the computer tells them what is wrong.. I guess that's what we get for relying on electronics to control everything...

I have heard of the oil from the K&Ns coating the MAFs. Did cleaning them fix it?

Have you checked your plugs?

Diagnostics came up clean at the dealer so they have no clue what to do or where to look now. They are waiting for direction from MB!

I cleaned the MAF's and it didn't fix the problem. Only happens when the engine is cold - maybe I should check plugs next but I've only got 2800 miles on the car. Maybe 02 sensors?
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Old Jan 21, 2012 | 11:03 PM
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Surely that is a warranty issue and the dealer has to fix it by law.
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Old Jan 21, 2012 | 11:29 PM
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Misfires/hesitations, check the plugs, turn the car on let it run till it misfires then turn it off. Pull the plugs and check them out.
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Old Jan 22, 2012 | 12:22 AM
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Originally Posted by Harold1898
Surely that is a warranty issue and the dealer has to fix it by law.

Sure, it is covered by warranty and it's going back to the dealer on Monday but they don't see any CEL's so they are not sure what to do or where to look. My SA said they do not have a clear idea of what to do next..My dealer has been good prior to this but they aren't exactly falling over themselves to try to fix this. I agree it's not a serious problem but it is very annoying.
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Old Jan 22, 2012 | 12:23 AM
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Originally Posted by Merc63
Misfires/hesitations, check the plugs, turn the car on let it run till it misfires then turn it off. Pull the plugs and check them out.
It's gong back to the dealer on Monday so I'll ask them to do this. Hope they do it!
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Old Jan 22, 2012 | 01:03 AM
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They won't do **** unless there's a CEL.
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Old Jan 22, 2012 | 11:36 AM
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Originally Posted by Merc63
They won't do **** unless there's a CEL.
Sadly, I think you are right.
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Old Jan 22, 2012 | 12:47 PM
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Did u remove your charcoal filters, if so just for kicks and giggles put them back in with ur kn filters and see is the hesitation is gone... We have seen this a few times with the charcoals removed.
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Old Jan 22, 2012 | 12:50 PM
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I always wipe down the K&N filters. Not until they are dry but to get a good amount of excess off.
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Old Jan 22, 2012 | 01:25 PM
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easy to remove....

1)Take off the silver cover on the top.
2) Remove the 2 screw holding it in
3) Jiggle and pull them out.
4) To clean them use sensor safe MAF cleaner.
5) Air dry COMPLETELY
6) replace

NOTE: remember which way they go in/face and which one was for which side.

Hope that helps
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Old Jan 22, 2012 | 06:38 PM
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Originally Posted by James@ACGSD
Did u remove your charcoal filters, if so just for kicks and giggles put them back in with ur kn filters and see is the hesitation is gone... We have seen this a few times with the charcoals removed.

Previous owner removed the charcoals and put K&N's in. Probably worth a try to put charcoals back in but why would the hesitation only happen when the engine is cold? Runs fine when the engine is up to temp.

Last edited by peh-amg; Jan 22, 2012 at 07:03 PM.
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Old Jan 22, 2012 | 07:04 PM
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Originally Posted by MBfinatic
I always wipe down the K&N filters. Not until they are dry but to get a good amount of excess off.

I took the K&N's out yesterday and wiped any excess oil off them and cleaned the MAF's - didn't fix the problem unfortunately.
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