JMB RetrofitsVolks Autos
Results 1 to 32 of 32
  1. #1
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155

    MAF readings are low....is this correct?

    I had a MAF error few weeks back which was cleared and has not returned since. Is a reading of 10.7g/s at 3k revs standstill correct? Or is my MAF on it's way out?

    Cheers,
    Chris
    Last edited by g10chy; 11th January 2011 at 20:59.
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    DaveA3's Avatar
    Audi A-Trizzle!

    Status
    Offline
    Join Date
    Feb 2010
    Location
    Milton Keynes
    Posts
    2,378
    u need to go for a spirited drive. try to get max revs 6500ish in 3rd gear. ull get proper readings then. too hard to compare revving on ur drive like.

    Audi A3 1.8T Sport (AGU) - 2000
    Engine: Carbonio CAI/Jetex JR Hybrid Induction, Forge 007p DV, Forge TIP, Longlife S/S Custom Exhaust system, R-Tech Stage 1 Remap, Creation Motorsport Boost Pipe Kit.
    Exterior and Chassis: 18" Cades Tyrus, Euro Wipers, low on JOM Coilovers, Eibach Front & Rear ARB's, Black Angel Eye Headlights, 6000K HID's, S3 Brakes.
    For Sale PM ME - £2500 Mods Inc

  4. #3
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Theses are some of my readings from 4k to 6k full load. How do these look?

    RPM Inj. On Timing Mass Flow g/s
    4440 150.4 143.28
    4840 155.6 144.86
    5240 149.6 147.06
    5560 142.1 152.33
    5880 133.8 144.83
    Last edited by g10chy; 11th January 2011 at 14:14. Reason: Changed format
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  5. #4
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by g10chy View Post
    Theses are some of my readings from 4k to 6k full load. How do these look?

    RPM Inj. On Timing Mass Flow g/s
    4440 150.4 143.28
    4840 155.6 144.86
    5240 149.6 147.06
    5560 142.1 152.33
    5880 133.8 144.83
    You need to do the readings to redline to be honest mate. Up to 6K isn't really that helpful.

    Considering that though, the readings are low, even at 6K for a remapped car.

    3rd gear, 3K to redline will give a good reading of the airflow - then post them up.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  6. #5
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    OK cheers Welly. I will try and borrow my mates cable overnight so I can get some proper runs logged and uploaded.

    Could it be that I simply have a sh!te remap? As my boost pressures seemed abit low also averaging between 17-20 psi with WOT!
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  7. #6
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Well, it's a bit hard to say. The values are low. You are making around 190 bhp at the best point of the values you posted.

    Could be a dying MAF, could be the map... But it would have to be an epicially bad map, as looking at what you posted before, it will struggle to make standard power.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  8. #7
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Welly - Could I email you the full log which has group 115 and 002 for the quick test run i performed for you to cast your eye over a bit more? Quite worried i've not been reaching its potential for quite sometime now
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  9. #8
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by g10chy View Post
    Welly - Could I email you the full log which has group 115 and 002 for the quick test run i performed for you to cast your eye over a bit more? Quite worried i've not been reaching its potential for quite sometime now
    Yep, no problem, I'll PM you my email address.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  10. #9
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Quote Originally Posted by Welly View Post
    Yep, no problem, I'll PM you my email address.
    Cheers man. I have just sent you the log.
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  11. #10
    Prawn's Avatar
    My other car is a MINI!!!!

    Status
    Offline
    Join Date
    Dec 2006
    Location
    Basingstoke
    Posts
    9,370
    Those airflow figures sound really low to me. especially for a mapped S3!

    Even without going to the redline, here's a tiny extract from the one log I could find on my work PC.

    This is a ko3S turbo too, not a ko4.

    RPM Airflow (g/s)

    4120 150.07
    5080 173.75
    5840 186.39
    6560 187.15

    So that's just an A3, and at 5000rpm it's making almost 20g/s more than you're mapped S3! something big time wrong there.....
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

  12. #11
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    OK, looking at that log, the airflow does look to be down, but it's difficult to be sure because it never gets to redline, and all the bursts of acceleration are short.

    If you can, go out again and log block 002, 020 and 115. Timing pull (020) is a useful block to log because it gives you a better insight as to what is going on.

    Try, again if you can, to do a several full runs in 3rd (or 4th if you are brave enough) from 3K all the way to 7K. Nice log logs are easier to gets useful info from.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  13. #12
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by Prawn View Post
    Those airflow figures sound really low to me. especially for a mapped S3!

    Even without going to the redline, here's a tiny extract from the one log I could find on my work PC.

    This is a ko3S turbo too, not a ko4.

    RPM Airflow (g/s)

    4120 150.07
    5080 173.75
    5840 186.39
    6560 187.15

    So that's just an A3, and at 5000rpm it's making almost 20g/s more than you're mapped S3! something big time wrong there.....
    Agreed, mapped S3s should be expecting 200 g/s or close to.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  14. #13
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Again, here is a brief excerpt from one of my very old Stage 1 REVO logs:

    Code:
    	RPM	Inj. On Time	Mass Flow
    TIME			
    STAMP	 /min	 ms	 g/s
    165.28	5600	19.27	194.69
    166.48	5840	18.86	199.25
    167.68	6080	18.04	198.92
    168.98	6320	16.81	194.42
    170.29	6520	16.4	189.42
    171.49	6680	15.99	191.64
    I have sent you the whole log for comparison.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  15. #14
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Quote Originally Posted by Welly View Post
    OK, looking at that log, the airflow does look to be down, but it's difficult to be sure because it never gets to redline, and all the bursts of acceleration are short.

    If you can, go out again and log block 002, 020 and 115. Timing pull (020) is a useful block to log because it gives you a better insight as to what is going on.

    Try, again if you can, to do a several full runs in 3rd (or 4th if you are brave enough) from 3K all the way to 7K. Nice log logs are easier to gets useful info from.
    Welly - Nice one for looking...I am borriowing my mates cable tonight so I will get some better runs logged. The roads were too busy this lunch to get any decent runs!!

    Will be in touch later.

    Cheers,
    Chris
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  16. #15
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    As per my email back mate, with standard S3 210 log attached for your reference.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  17. #16
    JD09's Avatar
    I'm not modding, I'm improving

    Status
    Offline
    Join Date
    Dec 2009
    Location
    Cheshire, Alderley Edge
    Posts
    3,080
    I still want to know why I got 186 from a standard car.

  18. #17
    superkarl's Avatar
    MAN OF STEEL

    Status
    Offline
    Join Date
    Mar 2010
    Location
    Liverpool/Southport. N west
    Posts
    7,533
    There was a hurricane that day that was blowing into your maf for a brief moment.
    Just a guess like

  19. #18
    Breezey's Avatar
    2nd Gear
    Hexxagon Champion

    Status
    Offline
    Join Date
    Mar 2010
    Location
    Bridgwater
    Posts
    433
    Quote Originally Posted by JD09 View Post
    I still want to know why I got 186 from a standard car.
    I got 181 from my standard S3, yours must be running that little bit better.

  20. #19
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Welly - I have just done a run in 3rd from 3k to redline....not looking good I have sent you the full log but the max MAF reading im getting is 159.5g/s!!!

    Im also getting a few Idle Stabilization figures which im guessing is not good also?

    Any ideas whats wrong?


    Cheers,
    Chris
    Last edited by g10chy; 11th January 2011 at 20:43.
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  21. #20
    RIP S3dave

    Status
    Offline
    Join Date
    May 2004
    Location
    nr Glos
    Posts
    7,175
    tired maf... most likely
    **http://www.facebook.com/Badger5Ltd**

    NEW NEW NEW eShop now LIVE>
    www.badger5.biz

    Badger 5 Ltd, Queen Annes Gate, Oldends Lane, Stonehouse, Glos, GL10 2DG


    http://www.badger5.co.uk, Tel:01453822880
    bill@badger5.co.uk
    **NEW** Badger5 Section CLICK here>> http://www.audi-sport.net/vb/213-badger-5/

  22. #21
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Lots of timing pull on the logs as well though. Not horrendous, but seeing 6s.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  23. #22
    "Stick a V8 in it!"

    Status
    Offline
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    15,379
    If the maf's tired wouldnt the fuelling be all over the shop though?

    Running lean will cause timing pull?

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  24. #23
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Yep, it's got dodgy MAF written all over it....
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  25. #24
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Quote Originally Posted by Welly View Post
    Yep, it's got dodgy MAF written all over it....
    OK nice one guys!

    Will the below part be OK or should I get and OEM one direct from Audi?

    HTML Code:
    http://www.eurocarparts.com/ecp/c/Audi_S3_1.8_2001/p/car-parts/engine-parts/fuel-and-engine-management/engine-management-sensor/?434440150&1&a413bd08cf642550236330dbb8c7f97fc7dcaf12&AFME
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  26. #25
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by g10chy View Post
    OK nice one guys!

    Will the below part be OK or should I get and OEM one direct from Audi?

    HTML Code:
    http://www.eurocarparts.com/ecp/c/Audi_S3_1.8_2001/p/car-parts/engine-parts/fuel-and-engine-management/engine-management-sensor/?434440150&1&a413bd08cf642550236330dbb8c7f97fc7dcaf12&AFME
    That one should be OK, as long as it's a genuine Bosch unit it will be fine. Check that with them beforehand.

    EDIT: Is does distinctly say 'Bosch' on the listing, so should be fine...
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  27. #26
    JD09's Avatar
    I'm not modding, I'm improving

    Status
    Offline
    Join Date
    Dec 2009
    Location
    Cheshire, Alderley Edge
    Posts
    3,080
    I'm going to log again tonight and see what mine is now getting.

  28. #27
    RIP S3dave

    Status
    Offline
    Join Date
    May 2004
    Location
    nr Glos
    Posts
    7,175
    Quote Originally Posted by aragorn View Post
    If the maf's tired wouldnt the fuelling be all over the shop though?

    Running lean will cause timing pull?
    it wont be helping the fuel trims... but if wideband car it will still be controlled by lambda
    **http://www.facebook.com/Badger5Ltd**

    NEW NEW NEW eShop now LIVE>
    www.badger5.biz

    Badger 5 Ltd, Queen Annes Gate, Oldends Lane, Stonehouse, Glos, GL10 2DG


    http://www.badger5.co.uk, Tel:01453822880
    bill@badger5.co.uk
    **NEW** Badger5 Section CLICK here>> http://www.audi-sport.net/vb/213-badger-5/

  29. #28
    RIP S3dave

    Status
    Offline
    Join Date
    May 2004
    Location
    nr Glos
    Posts
    7,175
    Quote Originally Posted by aragorn View Post
    If the maf's tired wouldnt the fuelling be all over the shop though?

    Running lean will cause timing pull?
    yes.. seen it a lot
    **http://www.facebook.com/Badger5Ltd**

    NEW NEW NEW eShop now LIVE>
    www.badger5.biz

    Badger 5 Ltd, Queen Annes Gate, Oldends Lane, Stonehouse, Glos, GL10 2DG


    http://www.badger5.co.uk, Tel:01453822880
    bill@badger5.co.uk
    **NEW** Badger5 Section CLICK here>> http://www.audi-sport.net/vb/213-badger-5/

  30. #29
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Getting my mate at Audi order me a new MAF....Discounted parts

    Will then do another log to see if the MAF readings have improved!!! Fingers crossed
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  31. #30
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by g10chy View Post
    Getting my mate at Audi order me a new MAF....Discounted parts

    Will then do another log to see if the MAF readings have improved!!! Fingers crossed
    Good luck dude, hope it sorts it for you. Should unlock some power for you....
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





  32. #31
    g10chy's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jun 2009
    Location
    Crewe, Cheshire
    Posts
    155
    Just fitted the new MAF and performed a new run feels alot better!!

    How do I get the results from Excel into the post without losing the formatting?

    Cheers,
    Chris
    Last edited by g10chy; 19th January 2011 at 14:02.
    2001 S3 - Ming Blue, Bose + AndyMac Stealth Sub + XCarlink iPod Interface with Bluetooth, Forge 007 (Yellow Spring), Green Cotton Panel Filter, Angel Tuning Remap, Milltek Cat-Back Resonated, Parking Sensors & Full Black Leather Nappa Recaros with Piano Black Trim.

  33. #32
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Chris, as per my email reply, there is still a little extra timing pull than is ideal. 6s are generally considered to be the limit of safe with regard to timing pull.

    I would take your top hoses off to check for oil inside - excess oil in the charge system can often cause higher than average timing pull figures. If there is a lot of oil, clean out as best as you can and then re log. Then keep an eye on the amount of oil in the charge system.

    I notice that it is only under heavy load in high gear, so you may want to avoid doing this too much until resolved. Ideally the timing wants to be backed down a little bit. Who mapped it?

    MAF readings are much better - a massive improvement. I would imagine there is an improvement on the road as well?

    Nice work - glad that the MAF problem has gone.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





 

 

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