EM TuningChris Nott
Results 1 to 8 of 8
  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    May 2012
    Posts
    25

    2.5 tdi temperature problem

    Hi guys I know this question has been asked a thousand times but I can't find much info on the 2.5 tdi engine code ake my temp gauge only ever reaches 70 degrees so I'm going to replace the thermostat and temp sensor is there a guide anywhere for doing this on a 2.5 ? Also would this cause problems with starting the car when it's warm ? When it's cold it starts fine with no issues but when it's been driven and heated up and turned off for about an hour it's very difficult to start I think that because the temperature gauge is faulty its messing up the air fuel mixture when starting would this be correct also I seem to have poor mpg top would this be another problem caused by the temp sensor ?

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    6th Gear

    Status
    Offline
    Join Date
    Nov 2009
    Location
    Lancaster
    Posts
    1,637
    Poor mpg can be caused by both a temp sensor and the thermostat.

    Thermostat on the 2.5 is not an easy job. It's behind one of the cam shaft sprockets. So it's worth doing the cambelt at the same time.

    As for the sensor. Lift the engine cover off and it's inbetween the V on the left of the engine at the front. It's green. There is a how to guide on here.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  4. #3
    Reverse Gear

    Status
    Offline
    Join Date
    May 2012
    Posts
    25
    Am I right that this could cause the difficult starting too ?

  5. #4
    6th Gear

    Status
    Offline
    Join Date
    Nov 2009
    Location
    Lancaster
    Posts
    1,637
    A knackered temp sensor certainly could.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  6. #5
    Reverse Gear

    Status
    Offline
    Join Date
    May 2012
    Posts
    25
    Cheers buddy thanks for your help

  7. #6
    quattrojames's Avatar
    Moderator

    Status
    Offline
    Join Date
    Mar 2008
    Location
    Dorset
    Posts
    13,712

    My Social Networking

    Follow quattrojames On Twitter Add quattrojames on Facebook
    Sounds like the CTS is the first port of call, as mentioned the thermostat is a job which requires new timing gear too.

    I have done a write up on the CTS, it's in the DIY guides sticky thread.
    Ingolstance Read about my A6 HERE.

  8. #7
    pauldazzle's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Nov 2009
    Location
    Cardiff
    Posts
    558
    Yep CTS first. Use a genuine VAG CTS only. Cheap aftermarket ones are very unreliable.
    A4 Avant B6 1.9 TDI 130 Sport (6) Moro Pearl Blue, GMBH S Line Kit, Decat pipe, 165bhp remap, EGR delete, Dunlop SP Max, Full Leather, Cruise Control, Full DIS, Bose, Audi phone prep, Cooled Glove Box, Rear privacy glass, Rear parking assist.
    2003 Seat Ibiza 1.2 TSI FR in Lima green.

  9. #8
    Reverse Gear

    Status
    Offline
    Join Date
    May 2012
    Posts
    25
    Cheers lads I was on to Audi this morning the have the cts in stock so I'll pick it up today and see how that goes as for the thermostat , timing belt is on the list of things to be done so when I'm getting it done I'll change the stat

 

 

Similar Threads

  1. A3 TDI temperature problem help needed
    By TurboDave in forum A3/S3 Forum (8L Chassis)
    Replies: 2
    Last Post: 14th November 2009, 15:14
  2. A3 1.9 TDI - Boost Problems
    By turbodan in forum A3/S3 Forum (8L Chassis)
    Replies: 9
    Last Post: 6th October 2006, 10:30
  3. 2000/2001 A3 TDI (ENGINE PROBLEM)!!!
    By mr964porsche in forum Diesel forum
    Replies: 6
    Last Post: 26th June 2006, 23:32
  4. A3 TDI turbo problems
    By GarryA3 in forum A3/S3 Forum (8L Chassis)
    Replies: 8
    Last Post: 17th April 2006, 13:25
  5. A3 2.0 TDI Starting problems
    By imported_simey in forum A3/S3/Sportback (8P Chassis)
    Replies: 6
    Last Post: 11th February 2005, 20:18

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