TD4 MAF Sensor

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RobBentley

New Member
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77
Hi All.

I've a friend with a very sluggish TD4 and I suggested pulling the MAF. I've just been outside and popped my bonet in the hope of sending a photo and low and behold, i've not got a clue.

On my Passat and my girlfriends car its very obviously on the pipe after the airbox... also is on her brothers Corsa.

Any clues or pictures as to where they've hidden it?
 
Hi Rob.
The maf sensor is next to the air filter, just behind the oil filer cap, you will need to remove the plastic engine covers to get to it, just found this picture on the site, (forget about the arrows, yellow and red).
The maf is at the very bottom left hand corner of the picture at the side of the oil filler cap.

pete.
 

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with fear of sounding stupid....

How the hell does the rear cover come off the engine. I can see the oil fillter cap will need to come off first - but even then with the 3 screws out it won't budge.

Looks like a pipe on the right hand side slots into it!?
 
Sounds like your removing the top of the air filter housing. There are two more blots at each corner at the back, there difficult to see but get your hand down there and you should feel them.
 
I don't think its a boost problem. Once it 'goes' it 'goooesss'. Its the bottom end thats given up a bit (when its off boost).
 
Once you've got the air filter housing off, yes you can try running the vehicle without MAF connected. If there is a significant improvement in performance yes the MAF may be faulty but my solution is to carefully spray the MAF airflow sensing film plate with a good quality electronics contact cleaner (Maplins) the plate becomes coated with goo and no longer senses low volume airflow, hence the initial hesitation. That's the easy bit now you've got to get the air filter housing correctly positioned. Good luck.
 
Does it work the electronic cleaner i take it you tried it did it give good results.i think mines on its way out and could do with a cheap fix even if only short term
 
cwinossett said:
Does it work the electronic cleaner i take it you tried it did it give good results.i think mines on its way out and could do with a cheap fix even if only short term
Click to expand...

Ming said he cleans his every year, since I read that I do the same, I use a brakecleaner spray and whipe/clean the plates gently with a cotton earstick, when there is dirt coming off I do it for a 2nd time, don't know whether it prevented any problems in the past years but it hasn't given any problems either anyway.
 
I apply a good quality electronics contact cleaner to the MAF sensor plate once per year during pre season maintenance whilst changing air filter and have no performance issues.
 
cwinossett said:
Been to maplins cleaned the maf this morning bloody hell what a differance well worth doing thanks
Click to expand...


I open up and cleaned mine today using the CRC MAF cleaner. Guess what the turbo inlet pipe was not connected properly and when i start there is a loud cranking noise like a screw inside a
the engine grinding. I check but there was no screws left out so no chance of anything droping into the oil filler.Went down and check saw the pipe was disconnected.Connect it back and it was ok.Did I do any damge on the engine/:confused:
 
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