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Lumpy idle... Time to admit my MAF has seen better days?

Discussion in 'A3/S3 Forum (8L Chassis)' started by Loupigs, Nov 16, 2010.

  1. Loupigs

    Loupigs Member

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    Boys and girls,
    After frightening the life out of me this weekend with an engine speed sensor fail and stalling at every junction in city centre rush hour traffic and then just refusing to start, my car now idles erratically. The boy wonder fixed the crank sensor problem with the £22 part from GSF and that's now all cleared on VAGCOM, but the revs are erratic and it has intermittent misfires at idle. Humph. Coupled with the way the car sometimes hesitates at 3.5k when I'm pulling away hard, is it time to assume my MAF needs replacing? Does anyone know the specific part number? Mine's a 2002 1.8T 150bhp AUM with minimal mods. There are several cheap options and then the Bosch one, £150ish on eBay or a bit less with Eurocarparts.

    Other than that, ideas? It had new plugs with a full service 6 months/5k ago, coilpacks are on tight and the throttle body is clean as a whistle.

    Ta much.xxx
     
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  3. aragorn

    aragorn "Stick a V8 in it!"
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    unplug it and see if it improves.
     
  4. Loupigs

    Loupigs Member

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    Boy wonder has the car for the day, is going to test it later on a route where I know the car is usually a bit sticky.
     
  5. finesse

    finesse Active Member
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    could be vac leaks, coilpacks or plugs, or a MAF gone wrong
     
  6. 16Klappe

    16Klappe I <3 Panda's!
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    Seriously love, I think this just might be part of the problem...

    Can you see it yet?
    [​IMG]

    Now maybe?
    [​IMG]

    Oh yea, here we go!
    [​IMG]

    Silicone replacement please :)

    Will unplug the MAF on the way home, but I think we've found our problem there!

    "Ewwww, put my engine covers back on. It looks horrible..." (lol) Function over form baby!
     
  7. JD09

    JD09 I'm not modding, I'm improving
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    Ooooft. That's not a leak, that's a flipping huge gaping hole!
     
  8. Loupigs

    Loupigs Member

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    Technically I wanted the covers back on because they were covering my boot in grot!
     
  9. 16Klappe

    16Klappe I <3 Panda's!
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    You knows it dude!

    Humpf :(

    PCV system out the window and fit a spanking catch tank maybe?
     
  10. Prawn

    Prawn My other car is a MINI!!!!

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    No. No silicon replacement, I've told you this before boy!

    The cheapest, AND best solution, is to do away with the n249, and the entire PCV system, as it's a huge load of ******** that's full of leaks.

    Sack all that lot off, and do an n249 bypass, which will cost you about £3 for the silicon, then buy a catch can on ebay, £30 for the one I have, and about £15 for all the hose and T you require, and the whole lot can be fitted in about 2 hours start to finish.

    So, that'll be the whole PCV leak system gone, the nasty n249 bypassed, and all for £50
     
  11. 16Klappe

    16Klappe I <3 Panda's!
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    Well Prawn, if I buy the bits fancy helping me do it when you come home for Crimbo?

    X
     
  12. Prawn

    Prawn My other car is a MINI!!!!

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    I guess I could do..... won't take long!

    ebay round catch tank, 19mm T piece, 19mm oil hose, clips for all of it, and 2m of vacuum line.
     
  13. Prawn

    Prawn My other car is a MINI!!!!

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    Will look like this:

    [​IMG]

    Oh, and you need a jetex filter too!
     
  14. Loupigs

    Loupigs Member

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    I'll get the bits, it's a date...
     
  15. DaveA3

    DaveA3 Audi A-Trizzle!

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    wanna swing by milton keynes on ur way n erm do mine aswell lol ill give ya beer n fuel money :p
     
  16. Prawn

    Prawn My other car is a MINI!!!!

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    yours is an AGU Dave, so you havn't got an N249 to worry about!

    can happily do a catch can install though, although you'd have to decide where you want the can placed, as that's down to personal preference really. on an AUM it's dead easy to just bolt it to the battery box ike on mine.
     
  17. 16Klappe

    16Klappe I <3 Panda's!
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    Filter is sorted.

    I love you Prawn, bffl.

    Seriously though, poor Audi! Phone me on your way home tonight Pronz, also I'll send you my xbox adapter so we can play Forza.
     

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