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    VWVortex


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    Thread: Misfire at cold start cyl#5

    1. 02-20-2012 11:01 PM #1
      I posted here a few weeks ago about this issue. Car is 2002 Passat, around 120k. Cylinder 5 misfires heavily at cold start, runs fine when warm. Done so far: new ignition coil, cables, spark plugs, dealer checked compression-good on all cylinders and "flushed" fuel delivery system(that made it misfire on 2 addition cylinders). Dealer said ecm was bad so I had it rebuilt by BBA twice (after first rebuild didn't change anything). BBA supposedly tested the ecm and confirmed it was bad, I say they are full of sh.. and just wanted to collect my $500+. Now I am back to misfire in #5. Spoke to a local VW specialist who is suspecting carbon build up. When I pulled the old plugs out they did have heavy black deposit/crust on them, maybe worse on cyl 5. What's the procedure to clean the carbon buildup on these engines?

    2. Member rayj's Avatar
      Join Date
      Jun 10th, 2009
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      norwalk, ct
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      2013 jetta 2.5L auto 2000 2.8L V6 blue wagon
      02-21-2012 12:52 PM #2
      Quote Originally Posted by ZeeGerman View Post
      Dealer said ecm was bad so I had it rebuilt by BBA twice (after first rebuild didn't change anything). BBA supposedly tested the ecm and confirmed it was bad, I say they are full of sh.. and just wanted to collect my $500+.....
      They sent me a bad ABS module, but wouldn't reimburse me the $100 i spent on a VAG scan to figure it out. POS outfit

    3. 02-22-2012 01:53 PM #3
      Yeah, they are not what they used to be...

    4. Member Slimjimmn's Avatar
      Join Date
      Apr 8th, 2006
      Location
      Rochester, MN
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      10,164
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      02 GTI 1.8t
      04-08-2012 12:08 AM #4
      seafoam your intake.

      There is a small vacuum port on the plastic intake pipe on the back of the motor. Take that off and do a seafoam cleaning.
      the car is on an inclined driveway and up on jack stands in the front only
      02 GTI 1.8t:> 42DD 3" turboback, BFI full stg1 mount kit, Evoms CAI, Forge boost hoses, Tacotaco sidemount, Ebay TIP, IE 2.0 coil conversion, IE manual tensioner, 20th front brake conversion, IE emissions delete, 42dd catch can, Koni STR.t & WRD sport springs, Samco Coolant hoses, SMF vr6 clutch kit.

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