Question about 2004 Volkswagen Jetta

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When I Accelerate, the car does not!

I have a 2003 Jetta and sometimes I will accelerate and the car will rev up and not accelerate. Any ideas?

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Transmission problems you may be low on fluid or it may be going bad

Posted on Jan 24, 2009

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When applying pressure to accelerator, it sometimes "sticks", revs REALLY high and the car har no power to the accelerator - have to pull over, turn off vehicle and restart...???


pull diagnostic trouble codes and post back, sounds like it could be a problem with tps or app sensors, assuming this is a drive by wire and not a cable driven system

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the car is fitted with a fuzzy logic gearbox,computer controlled within the engine management system.it will try to make you drive as economically as possible taking into account the gas pedal possition/road speed and load.it will also adapt to your driving skills.
so if you drive in town all the time it will change at higher revs and out of town, if you accelerate gently,lower down the rev range.Try this.without using the gas pedal put the car in drive and let the car do the work,it will accelerate on its own upto 4th gear.
then try again, from stop, keeping your foot about 1/3rd down on the gas and let the car do the work try not to move your foot.then, if you can, drive using only a max of 1/3rd gas pedal all the time and you will find within 100 miles the car has adapted to this and your gas mileage will go thru the roof. also the car will adapt to high grade gas.adjusting engine output to match.

Mar 12, 2010 | 2002 Volkswagen Jetta TDI

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While driving my 2003 Jetta TDI last night accelerating up a hill my battery light came on and the car died. All other lights work, glow plug light still comes on. Engine turns over but does not fire. ...


Did you check the battery? Alternator? The 2003 Jetta TDI's are FAMOUS for breaking the alternator pulley right off the shaft. Is your serpentine belt hanging?
You could have a bad battery, broken alternator, broken serpentine belt, or bad alternator among a few other things. If your belt is hanging either the belt broke or more commonly, the alternator puller broke off the shaft.
It happens all the time with the 2003's

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If this an automatic replace your throttle cable located in the same place with that of the accelerator cable. Keep me posted.

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good chance you have a clogged cat converter ...with engine running have someone rev engine and see how much flow you have out tail pipe. also if you hear the sound of something rattling inside exhaust that is another tell tale sign

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these cars are fitted with a fly by wire accelerator pedal that is controlled electronically by the cars computer it is possible that there is a computer problem or the throttle body ( air intake system )or accelerator pedal is playing up.
it is highly possible that the car is doing exactly what you say it is i recommend you take it back to VW and demand that they take a proper look at it you might have to leve it with them for a couple of days and get a service advisor to drive it home so as they can see the problem ocure.
regardles the cars computer should of thrown a code declaring a fault in the system witch should give the tecs some were to start looking.

good luck with this problem if you have any outher questions let me no

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Don't know if it applies to your diesel but most later gas engined vehicles have a 'cold start' valve that supplies additional fuel to the fuel/air mix along with boosting the idle speed until some warming of the engine is sensed.

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