Sky InsuranceJMB Retrofits
Results 1 to 13 of 13
  1. #1
    WillJP's Avatar
    Neutral

    Status
    Offline
    Join Date
    Dec 2011
    Location
    Portsmouth
    Posts
    32

    1.8t with serious issues.. can anyone work this one out?

    Right,

    my a3 started playing up, misfiring and running rich so brought it in at work and got this..

    20121110_155631.jpg

    says to me that the map sensor is shagged, plus boost leak, so in the process of fitting the fmic i fitted a new one. Then after a good bit of modifying trying to get the bumper back on lol i cleared the codes and fired it up but then got, map sensor signal too high, and got this on live data lol.. (engine is off)

    20121116_202157.jpg

    Ok so thought the map sensor was faulty but thought i'd check the wiring just in case and found a brake in one of the wires. Fixed the brake but still getting the same.. So unplugged the map sensor and ran live data with the engine off and it's still the same?!..

    Now i've either got the trace the wires back further to see if i find anything, the repair has messed with the signal, or the ecu is shagged??.. 1000 bar ffs!

    Can anyone shed any light on the situation?

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Broken Byzan's Avatar
    Photographic Moderator

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Cardiff, United Kingdom
    Posts
    12,523

    My Social Networking

    Follow Broken Byzan On Twitter Add Broken Byzan on Facebook Add Broken Byzan on Google+ Visit Broken Byzan's Youtube Channel
    The map sensor will show around a bar due to that being absolute pressure, anything the turbo generates is over and on top of that.

    Can't say I've ever seen a sensor too high before, the worst they do is max at 2550 mb.Were they the same sensor?

  4. #3
    Lewis583's Avatar
    4th Gear

    Status
    Offline
    Join Date
    Mar 2010
    Posts
    872
    It's not reading 1000BAR, it's reading ~1000mbar(milibar) which equals 1bar which is atmospheric pressure.

    If you look at Boost pressure cell in Live data you see how it reads 1400mbar, It reads this because you have unplugged the sensor so it is using a default reading. Plug the sensor back in and clear the codes and recheck the live data.

    How was the wiring repaired? Soldered or using crimp connectors? I always prefer soldering as you are certain to have a good repair.
    2008 E92 BMW 335i M-sport
    1990 Golf GTi w/ a 20v heart BUILD THREAD
    Full VCDS

    2006 A3 2.0T quattro S-line R.I.P. You will be missed.

    ** Breaking - 8L 1997 Audi A3 1.8T. **

  5. #4
    WillJP's Avatar
    Neutral

    Status
    Offline
    Join Date
    Dec 2011
    Location
    Portsmouth
    Posts
    32
    ahhh millibar! haha! it's been a long day lol we were stupidly puzzled awell! ha

    the wiring is soldered with heat shrink. so the wiring is actually ok then right?..

    Well the reading doesn't change even when plugged in and running but.. the map sensor isn't genuine so i'm thinking i've shooting my self in the foot on that one

  6. #5
    WillJP's Avatar
    Neutral

    Status
    Offline
    Join Date
    Dec 2011
    Location
    Portsmouth
    Posts
    32
    Nope, there's still a head ache! Lol I've checked the wiring from plug to ecu and they're fine. Tried it with a genuine map sensor and still the same, plus it still giving the same fault code even with it unplugged..

    Map/boost sensor signal too high

    Even went back to the standard map but still there so coming to the idea that the ecu has spiked some how..

    Next step to send the ecu off for repair?

  7. #6
    olethalb's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Aug 2012
    Posts
    314
    have you extended the map sensor loom with the same spec wire, thicker could cause more resistance.

    i'd recheck all connections and joins thouroughly, last time i saw this issue was a broken wire to the MAP sensor

  8. #7
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    Check all engine earths

  9. #8
    RIP S3dave

    Status
    Offline
    Join Date
    May 2004
    Location
    nr Glos
    Posts
    7,183
    maf sensor too high, too high map sensor signal.... whats the chances is the boost is going too high.... if not an electrical fault these faults could be teling it how it is

    the map sensor reads, you have ~1000mb for ign on no engine running..

    got access to a smoke tester? if so look for leaks and pipes from charge pipe to n75 to actuator...
    **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/

  10. #9
    WillJP's Avatar
    Neutral

    Status
    Offline
    Join Date
    Dec 2011
    Location
    Portsmouth
    Posts
    32
    It's back to the standard map and its still there as a hard fault, even with the sensor unplugged, which of course mainly says it's wiring. I checked the wiring and found an old repair that had come apart again so fixed that.. I've checked the wires from the ecu plug to the map sensor plug with wiring diagrams and they are fine.

    I am down to either thinking that the repair is causing resistance in one wire or it's the ecu..

    may sound odd but would you say that if the 3 wires had a repair in the same place, it would give the wires the same resistance again?.. Just an idea because i feel literally drained with it all lol plus I'm getting fed up with walking!!

  11. #10
    s3dave's Avatar
    TFSI Hybrid

    Status
    Offline
    Join Date
    Nov 2009
    Location
    west yorks
    Posts
    10,121
    Checked for continuation right back to the ECU?
    Make sure the ECU is not swimming in water?

    What about unplug the ECU and check for corrosion on the pins?

  12. #11
    WillJP's Avatar
    Neutral

    Status
    Offline
    Join Date
    Dec 2011
    Location
    Portsmouth
    Posts
    32
    yea they are fine,

    haha yea i did think about it swinging in there but it was pretty dry and it was a wet day. the ecu and connectors are fine, just the little sliders it's sitting in is a little corroded

  13. #12
    WillJP's Avatar
    Neutral

    Status
    Offline
    Join Date
    Dec 2011
    Location
    Portsmouth
    Posts
    32
    Quote Originally Posted by WillJP View Post

    may sound odd but would you say that if the 3 wires had a repair in the same place, it would give the wires the same resistance again?.. Just an idea because i feel literally drained with it all lol plus I'm getting fed up with walking!!
    Can anyone back me up on this?

  14. #13
    JUS3IN's Avatar
    silver sleeper

    Status
    Offline
    Join Date
    Mar 2013
    Location
    kent nr maidstone
    Posts
    693
    i know have a map sensor high code... get to teh bottom of yours?
    1999 apy s3, n249 delete, sai and n112 delete. bbs lm reps, s2000 filter, relentless v3 manifold, relentless downpipe and sports cat, scorpion cat back system, badger 5 v3 tip, bam rocker cover, push in coilpacks, toyosports fmic, amd remapped to 280.3 bhp and 263.9 lb/ft.

 

 

Similar Threads

  1. 2004 A8 with 'issues' can anyone help?
    By RRH685 in forum A8/S8 forum
    Replies: 1
    Last Post: 16th March 2010, 06:37
  2. VID Magic Trick: Holy Sh*t - Work this one out !!!
    By hop2407 in forum Jokes, Games & Humour
    Replies: 5
    Last Post: 12th October 2006, 13:43
  3. German Audi A3 Facelift Update, Can anyone Translate this? Adobe PDF
    By DaveS3Turbo in forum A3/S3/Sportback (8P Chassis)
    Replies: 8
    Last Post: 3rd May 2005, 23:05

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