Question about 2003 Volkswagen Jetta TDI

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Loosing power/transmission Went up a hill with good percentage of grade and car would (an automatic) would shift down to 2nd and would not shift back up to higher gears until you peaked the hill.We had been drive the car for about 5 hours strat in 90++ heat. This went on for about 1 1/2 hours till we reached our destination. 3 Days later it happened again after 3 hours of driving not quiet as hot. Shut if off for 10 minutes and then ran another 3.5 hours and no problems. There are no ligths on the dash. Car has 96000 miles on it and the timing belt was changes at 90000. Help.

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We finally had to take it to the shop and had the intake manifold cleaned, and now we are back in business. thanks for you help
Lori

Posted on Sep 21, 2008

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Could be an issue with losing boost from your turbo. Can you hear your turbo spinning correctly? I know some TDIs have turbos that are a little easier to hear than other for no apparent reason. Are all your vaccuum lines in good shape? Are the hoses from the turbo to and from the intercooler in good shape? Maybe when something (vacuum hose, intercooler hose) gets warm enough it flexes and leaks. Right when this happens you should pull over (if possible) open the hood and have someone give it a little fuel. You might be able to hear a vacuum leak or an air leak in the intercooler piping. It could also be a bum sensor that sticks at a certain value and when you stopped and restarted you unstuck it.
You need to start eliminating items or find any other symptoms you can to help narrow this down. It is a loss of power right, and that's what is keeping it in the lower gear? Or does it seem more like it is just stuck in lower gear?

Posted on Sep 20, 2008

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The long answer:
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