Question about 2001 Volkswagen Jetta TDI

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2002 jetta 4 cyl runs very rough, and firing order seems to be misfiring? engine is not overheating, although once warmed up it lags while excellerating. Noticed that it appears that sparking or arking is visible while trying to see connection area of plug wires. New Battery has stopped the car from dying at an idle. While starting off in morning the car runs well gaining speed without hesitation once med. temperature is obtained up hill vechicle will hesitate unless acceleration is decreased momentarily, as though the engine is trying to catch up with rpm's, and still does not regain increased acceleration while going up hill. It will gradually loose rpm's while climbing from optiomal speed of 70, decreasing to 25 or 30 mph. We have had so much expense to this vechicle and are searching desperatley for a reasonable explanation or rememdy for this issue. At peak of medium temperature vechicle runs as though the firing order is wrong. plugs and wiring have been replaced within the last 6 months. rebuilt transmission replaced within last 6 months. catalatic converter replaced upon purchasing vechicle second hand Jan 15, 2012. Can you please advise we would be most appreciative Thanks Kellie Estrada

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  • 18 Answers

Check timing of the engine is right using an engine timing light. Make sure the timing belt or chain isn't worn or slack. The head gasket could also have gone and may need replacing.

Posted on Feb 15, 2014


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Posted on Jan 02, 2017

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SOURCE: 1990 cabriolet manual transmission. Car stumble and looses power

have u checked belt timing ?

Posted on Feb 18, 2009

  • 2 Answers

SOURCE: lacks power

check the mass airflow sensor. When bad, there is reduced power and the computer uses a default setting

Posted on Mar 24, 2009

  • 1392 Answers

SOURCE: Changed plug wires still running badly

What kind of wires did you use? If you used some cheap ones, that is most likely the problem. Get the VW wires if you didn't get them to begin with.

Posted on Jul 06, 2009

  • 2317 Answers

SOURCE: my 1987 vw jetta hesitates

I would check the fuel filter, which is under the car, below the passenger side rear seat.

Posted on Oct 23, 2010

  • 4044 Answers

SOURCE: 2002 Jetta GLS Sportswagen with

If this is an automatic check the fluid level of the transmission. It sounds like your running low on transmission fluid. Since you have been driving it in this condition and don't seem to be alarmed at the high rpms I would take the vehicle to a transmission shop and have the transmission checked.

I have a V-6 Automatic and a Standard 4 Cylinder and I cruise at 2000 to 2500 and almost never exceed 3000 rpm at any speed. I would bet after you have that transmission fixed your gas mileage will most likely double if not improve more.

Posted on Dec 10, 2010

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