Fourtitude.com - VRT cold start issues
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    1. 09-03-2019 08:57 AM #1
      So im having an issue with the vehicle on a cold start, if its not warmed up to full operating temp the vehicle will not stay running after acceleration. Sometimes you can take off and drive but as soon as you push in the clutch pedal it will die. Usually it will start right back up but at times it was try and start and then back fire. I recently changed the plugs and wires to see if that changed anything but i still the same issue. Has anyone dealt with with issue before ?

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    3. Member Junkyarddawg's Avatar
      Join Date
      Dec 4th, 2013
      Location
      Central Florida
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      126
      Cars
      1996 GTI 2.0T ABA,1994 E420,1998 E300TD, 2001 A6 2.7T, 2000 GTI VRT GT35/82R
      09-03-2019 10:31 AM #2
      Need more info on your setup, MK3? OBD1 or OBD2?,MK4? What EMS? Any fault codes, etc...
      Gun to the head, sounds like ECT or MAF related issue.

    4. 09-03-2019 10:54 AM #3
      Quote Originally Posted by Junkyarddawg View Post
      Need more info on your setup, MK3? OBD1 or OBD2?,MK4? What EMS? Any fault codes, etc...
      Gun to the head, sounds like ECT or MAF related issue.
      Mk4 obd2 , no fault codes present. Im running C2 software about 4-5 years old.

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    6. Member Junkyarddawg's Avatar
      Join Date
      Dec 4th, 2013
      Location
      Central Florida
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      126
      Cars
      1996 GTI 2.0T ABA,1994 E420,1998 E300TD, 2001 A6 2.7T, 2000 GTI VRT GT35/82R
      09-03-2019 04:42 PM #4
      Without getting too technical about it, you could try to clean the MAF sensor or trial fit a known good one and replace the green ECT sensor, then recheck operation.
      If the problem is consistently present on cold run operation you should see a difference right away if ECT or MAF sensor is the root cause.
      Make sure that the engine harness sensor plugs are fully engaged and locked. The MAF and ECT plugs are commonly damaged upon removal if not released properly on the MK4 harness so take
      a close look at the harness connections and plug insertion.
      BTW do you have VAGCOM or wideband 02 gauge in the car? What region are you in and how cold is cold?

    7. Senior Member reynolds9000's Avatar
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      Oct 16th, 2003
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      Huntsville, Alabama
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      25,005
      09-07-2019 08:16 AM #5
      Put the stock chip back in and see if it runs better. If it's not the chip i'm going with a MAF issue.
      1995 Jetta GLX - Candy White
      1997 Jetta GL - Sequoia Green - 12v VR6 - Vortech V2

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