Question about Volkswagen Jetta

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2000 TDI - Lots of white smoke at cold start. Engine misses badly at midrange and at cruising conditions. Good power when peddle is mashed and seems to run smooth then. White smoke mostly goes away at idle after the car reaches 190F. Replaced: turbo, injector pump, injectors, glow plugs, rings, egr, MAF sensor, cleaned intake and EGR cooler, timed properly, head was pressure tested. The white smoke is almost certainly unburnt diesel as it smells like it and burns the eyes - and it's ALOT of smoke.

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  • psjr21969 Jul 21, 2009

    The timing was set at VW dealership with their scantool. I was standing right there when he did it. It fell nicely within the range as specified by VW

  • Joe Blow May 11, 2010

    Was your timing set with Vag-Com?

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Sounds like your injection pump timing is off, an injector is leaking or a bad seal on your IP.
VW dealers have a horrible reputation when it comes to TDI's. Check out the posts over at www.tdiclub.com Those guys are very knowledgeable - and the first thing they'll tell you is don't take it to a dealer.
You can probably find someone in your area that has a copy of Vag-Com (scantool software that vw uses) software that could look at your timing. It definitely sounds like your dealer was throwing parts at your car because they didn't know what your problem is. If I were you, I'd copy and paste your post from here over at www.tdiclub.com

Posted on Jul 21, 2009

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Not sure what "tick over" means. Suspect it is hard to start when cold? Could be bad glow plugs. They "warm" the cylinders to get them up to temp before starting. It could also be that you are not waiting for the cylinders to warm up. I have a 2009 tdi. It has a light on the dash that goes on when I put the key in, but I have to wait for it to go out before starting the engine.

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This seems to be a symptom of a blown head gasket.
White exhaust smoke is an indication of water / coolant in the exhaust. The car running sluggish and using lots of fuel can be caused by compression loss.

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