Sky InsuranceVolks Autos
Results 1 to 16 of 16
Like Tree1Likes
  • 1 Post By demus

Thread: limp mode.

  1. #1
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75

    limp mode.

    Hi all, just returned from doing nearly 1k miles in the last week with no problems at all.I left the house this morning and when i went to accelerate past a slow moving car my car went into limp mode.
    I switched it off and then back on again and a normal service was resumed.The car ran normally on my 15 miles spirited return journey.
    The car was recently serviced by myself.Oil and all filters were changed.
    I scanned the car for faults and none were stored.

    How do log the scan of the maf sensor and what other blocks should I log ?


    M

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    simon.m's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Oct 2009
    Posts
    2,746
    iv had this a few times my maf did not show any codes at all may be worth looking at the n75 valve as well this also puts mine into limp mode i got a new one and still does it some times im told its the pipes get old oil in them this goes to the egr one more thing to clean out nothing bad though

  4. #3
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    Thanks Simon, I've got spare sensors that I've removed from a golf I recently broke.I did notice that it is pretty oilly around the egr valve. Think i may replace that with the one from the golf if it's the same aswell.
    M

  5. #4
    1st Gear

    Status
    Offline
    Join Date
    Sep 2009
    Location
    Rumburgh Suffolk
    Posts
    175
    The vanes in the turbo got sooty in my TDI, they would move to give boost, but as the revs rose they got stuck and it overboosted, resulting in limp mode, but with no management light, restarted it all was fine again untill they got sticky again...
    paul20v likes this.
    Mark

    2001 A4 TDI 130 SE, takes me to work
    2011 Suzuki Alto SZ4, tootles the good lady around
    1992 Replica Cobra 4.6V8, makes lots of noise...
    and gives you neck ache, and isn't for sale anymore...
    1949 Ferguson TED20, moves things that I can't move
    1959 Massey Ferguson 35 TVO, thats two ticked off the list...
    Lucky the good lady likes tractors...

  6. #5
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    Little update,I changed my maf and map sensors for my known good ones from my golf.All seemed fine, then on thursday I hooked on the caravan and within a mile the car had went into limp mode.
    It then happened another twice on the journrey but after the eml came on.
    The eml light stayed on for another 2 days and on the day I was due to come home the light went out.
    I never had any problems on the return journey,no limp mode and no eml.
    I will scan for any fault codes when SWMBO returns from shopping.
    M

  7. #6
    5th Gear

    Status
    Offline
    Join Date
    Oct 2009
    Location
    Hull
    Posts
    1,433
    Sounds like sticking turbo vanes to me

  8. #7
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    Hi stu, not really convinced vanes are sticking as its just started happening, car gets driven, I dont just drive like miss daisy. the only other thing that has changed is that I,m running on pump diesel now and not bio as my suppliers machine has broke.
    STRANGE.
    M

  9. #8
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    Another update, just scanned car and it's showing fault code 17965, looks like its overboosting.
    Can some one tell me where is the N75 valve as I'm going to change it as after fault codes are cleared the fault remains, then. hopefully Mr Muscle to the rescue.

    M

  10. #9
    5th Gear

    Status
    Offline
    Join Date
    Oct 2009
    Location
    Hull
    Posts
    1,433
    I would clean the turbo first it will cost a few quid cheaper the the n75

    My brothers car has just done it and he doesn't drive like miss daisy either!

  11. #10
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    Ok will give it a try with Mr muscle and will change the N75 valve.
    I'll use the one from my golf as I never had any problems with it even running a remap.
    Do you know where the N75 valve is ?
    M

  12. #11
    5th Gear

    Status
    Offline
    Join Date
    Oct 2009
    Location
    Hull
    Posts
    1,433
    its on the drivers side front just follow the vac pipes

  13. #12
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    thanks,

  14. #13
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    Ok I've found 3 sensors in front of the air filter housing..
    Any idea which one is the N75 valve?
    M

  15. #14
    simon.m's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Oct 2009
    Posts
    2,746
    n75 valve is just behind the drivers headlight you will see it cliped on there at the bottom

  16. #15
    Neutral

    Status
    Offline
    Join Date
    Nov 2011
    Location
    South Lanarkshire
    Posts
    75
    Thanks . I'll get a new one ordered this week.. Unfortunately I don't have a matching spare..
    P/n on it was 8E0 906 628 C does this look right..
    M

  17. #16
    1st Gear

    Status
    Offline
    Join Date
    Sep 2009
    Location
    Rumburgh Suffolk
    Posts
    175
    While your in there, see how the vacuum actuator rod feels to move on the turbo, should move relatively easily and snap back when you release it
    Mark

    2001 A4 TDI 130 SE, takes me to work
    2011 Suzuki Alto SZ4, tootles the good lady around
    1992 Replica Cobra 4.6V8, makes lots of noise...
    and gives you neck ache, and isn't for sale anymore...
    1949 Ferguson TED20, moves things that I can't move
    1959 Massey Ferguson 35 TVO, thats two ticked off the list...
    Lucky the good lady likes tractors...

 

 

Similar Threads

  1. Limp Mode/MAF Problem????
    By GarryX in forum A3/S3 Forum (8L Chassis)
    Replies: 12
    Last Post: 30th August 2005, 11:10
  2. Limp Mode
    By welshdragon in forum A4/S4 forum(B5 Chassis)
    Replies: 3
    Last Post: 23rd February 2005, 09:55
  3. limp mode due to inlet manifold pressure HELP !!!
    By sahk in forum A4/S4 forum(B5 Chassis)
    Replies: 3
    Last Post: 13th January 2005, 19:39
  4. Going Into Limp Mode
    By johnboy1 in forum A3/S3 Forum (8L Chassis)
    Replies: 8
    Last Post: 25th October 2004, 17:55
  5. N75J and limp mode (overboost problems)
    By pure in forum A3/S3 Forum (8L Chassis)
    Replies: 9
    Last Post: 21st June 2004, 18:52

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