Chris NottAH Fabrications
Results 1 to 5 of 5
  1. #1
    kkk
    1st Gear

    Status
    Offline
    Join Date
    Aug 2013
    Location
    North London
    Posts
    109

    quick maf sensor question

    does any one know if i could change my air flow sensor to a differant part number. its currently fooc 2g2 040 but the other i have spare has 027 instead of 040.

    should it still work?

    thanks

    Neil

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    slappy_dunbar's Avatar
    Let's Do This

    Status
    Offline
    Join Date
    Jan 2010
    Location
    Westchester Cty, New York USA
    Posts
    229
    you are talking about the sensor itself, which resides inside the plastic housing. Yes? I believe the replacement sensor you have is from older, narrow-band cars. But the -40 series sensor is from newer vehicles. I'm afraid they're not interchangeable, causing your ECU to interpret your airflows inaccurately.

    Have a looksee here for some excellent pictures of the sensors available.

    The Build - A GT2871R build documentary - Page 11

  4. #3
    kkk
    1st Gear

    Status
    Offline
    Join Date
    Aug 2013
    Location
    North London
    Posts
    109
    Well tbh they are both from pre wideband cars but the 040 is in my 2000 1.8T and the other was one I bought for my old v5 golf on a v 99 both look identical apart from the last 3 digits.

    Iv read 040 was from pre wideband and 049 is from newer models like aums but cant find any info on useing the 027,

  5. #4
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Online
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,583
    040 is narrow band and 049 is wide band... you can't mix them as the scaling is different... based on your previous posts you have an AJQ A3 TQS?... this is narrowband ECU I believe and the 040 is the correct sensor to use... using a n other sensor will throw fuelling out under WOT...

    Buy the right one and buy a new one rather than a second hand one as they are service items and go wrong... a second hand one is a false economy

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  6. #5
    kkk
    1st Gear

    Status
    Offline
    Join Date
    Aug 2013
    Location
    North London
    Posts
    109
    Ahh my man your correct and thats where im having the probloms probly down to the 027 sensori was useing so il run it with the broken sensor till I can get in for a new one, problom is the houseing number could have any sensor in it from what iv seen.

    Thanks very much.

    NEIL

 

 

Similar Threads

  1. my last question regarding my maf sensor
    By 4rings in forum A3/S3 Forum (8L Chassis)
    Replies: 5
    Last Post: 13th April 2011, 07:50
  2. Head Lamp Conversion, Exhaust and MAF Sensor Question!
    By a3t-ian in forum A3/S3 Forum (8L Chassis)
    Replies: 0
    Last Post: 18th January 2011, 21:57
  3. Quick vagcom/map sensor question
    By loafofbrett in forum A3/S3 Forum (8L Chassis)
    Replies: 0
    Last Post: 4th March 2010, 11:12
  4. MAF sensor fitting question
    By MattW86 in forum A3/S3 Forum (8L Chassis)
    Replies: 0
    Last Post: 25th August 2009, 20:47
  5. n75 j valve and maf sensor question
    By Jonesy in forum A3/S3 Forum (8L Chassis)
    Replies: 5
    Last Post: 26th September 2006, 13:14

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO