Question about 2002 Volkswagen Jetta TDI

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I have a 2002 jetta tdi, a seal in the injector pump was leaking diesel fuel so I got a rebuild kit and installed the new seal. The car would not start untill I retimed the crank, cam, and injector with the timing belt. Now it starts right away but rpms run up without stopping untill i shut it off with the key. Did i put the pump back together wrong?

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Don't think you did anything wrong, but...
after retiming you have to relearn the computer stratagies
without a pro scanner the only way will be with about 60 drive cycles

Posted on Aug 02, 2010


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98 diesel Jetta TDI rebuild engine won't start

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Engine rpm's increase without increaseing throttle,on start up. Not consistent. Goes back to normal quickly before driving. Happens ocasionally during driving. Fuel economy not affected.

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I have air coming into the fuel system on my jetta diesel

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and if their are tiny bubbles in the clear line coming from the fuel filter to the injection pump that is normal. Even when the car is not running it is normal to see bubbles in the line. hope this helps.

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2003 vw jetta tdi fuel filter

It is on the passenger side right behind the washer fluid fill tube. You can follow the fuel lines (look like 1/4" black tubes, some are clear) from the injector pump to it. It is a caniser a bit bigger than a normal looking oil filter and sits between the washer bottle and the metal that forms the wheel well. It is held in by a screw type clamp about half way down the cylinder. Probably isn't the fuel filter unless there is air in the lines to the injector pump or they didn't bother to fill the fuel filter up with diesel after putting it in. There is not a fuel pump in the tank in these cars so everything is sucked up by the injector pump and it needs to be primed properly.

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