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Author Topic: 02 VW Jetta Problems- HELP  (Read 1628 times)

Offline ren02

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02 VW Jetta Problems- HELP
« on: January 31, 2006, 11:55:39 am »
Having a problem with my 02 Jetta 1.9 TDI. Car loses power for a few seconds and then regains it again when going up a slight grade or even when driving along a level stretch of road. When it regains the power excessive black smoke comes out of exhaust. Have already changed the air & fuel filters and have tried a new MAPS senor which did not help. Any suggestions.
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Offline articsteve

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Re: 02 VW Jetta Problems- HELP
« Reply #1 on: January 31, 2006, 01:02:25 pm »
You need to state mileage.  Sounds like a fuel injection problem off hand. If this motor has an injection pump I'd be thinking that.  In my limited diesel ownership the injection pump failed rather evidently, but it was still driveable but under load it had limited power and smoked bad.

Who suggested the MAP sensor?  I dunno if a weak injection pump will send a code or not.
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Offline sirAQUAMAN64

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Re: 02 VW Jetta Problems- HELP
« Reply #2 on: January 31, 2006, 01:48:38 pm »
I would say your turbo wastegate may be sticking as well.

Check/change the sensor for that, or could be turbo replacement. Better hope it's not a Bosch injector unit, as they cost BIG money (hence why you MUST change your fuel-water separator at intervals to prevent water from entering and damaging the injector and buy quality grade diesel)

Other than what you've already checked, I'd investigate that and whatever other advise might come up.

Do you have a check engine / Malfunction Indicator light on?

I would try posting on www.TDIClub.com as well.

The MAF sensor and EGR valve wouldn't cause what you're describing I don' think. They usually result in gradual reduction in power over time as the components collect particulate matter.
« Last Edit: January 31, 2006, 01:53:39 pm by sirAQUAMAN64 »
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Offline ren02

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Re: 02 VW Jetta Problems- HELP
« Reply #3 on: January 31, 2006, 05:45:14 pm »
Car has 108,000ks on it. No codes showing up. Checked turbo boost by installing boost gauge and starts out at 18lbs and drops back to 11lbs. Always run quality diesel fuel in car.
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Offline sirAQUAMAN64

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Re: 02 VW Jetta Problems- HELP
« Reply #4 on: January 31, 2006, 05:52:11 pm »
I thought it might have been the turbo wastegate boost solenoid, but probably not.

Where are you taking the car? Perhaps another tech/dealer might have additional knowledge.

And I would seriously check out TDIclub.com.
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Offline maritime_storm

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Re: 02 VW Jetta Problems- HELP
« Reply #5 on: February 04, 2006, 05:59:36 am »
Has your car had the fuel shut off check ball in the pickup assembly modified by VW yet? If not I'd get them to do it quick, that pump ain't cheap.
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