Question about 2002 Volkswagen Jetta TDI

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2002 volkswagon tdi lacks power

I have a 2002 volkswagon tdi diesel with 389000 kilometers on it. All highway kilometers that takes kilometers to get up to 80 kilometers and hour I replaced catalatic converter,fuel filter,air filter and 4 glow plugs. The car at idle if I hold it to the accelerator pedal to the floor the rpm barely goes above 1500 rpm. If I am driving I can upshift gears at a lower rpm to get up speed faster.if I barely touch the pedal driving I feel the car chugging so I push the pedal a little farther the chugging goes away but the speed dont increase. I smell diesel in the exhaust and there is a lot more smoke than usual. I tried buying redex in case its a sticking valve here in canada but was unsuccessfull. No one knows what that is. Someone told me to start engine step up idle with intake breather pipe off and spray water in the injector throat and this will steam the valves clean but I dont feel right about putting water in my engine. If it is a sticking valve what can I do and what causes a sticky valve. I also took the 4 fuel lines to the injectors and each line has lots of fuel pouring out. The car is a 2002 and I really dont want to scrap the car but really dont want to spend thousands to fix the problem either

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  • johnbinder40 Nov 23, 2008

    I replaced it and still the same....I narrowed it to either the injector pump or a injector problem



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  • 79 Answers describes numerous ways the trouble shoot what he calls "limp mode."

I had this happen to me today and it was the needle life sensor on the #3 fuel injector. I checked the resistance of the sensor and the sensor is good.

I finally corrected the timing issue I had with my camshaft being off a tooth and the "limp mode" was instantly gone. Keep in mind I had started and stopped the car several times and did not reset the computer. On the first start up, the issue was gone.

There is always the possibility of the fuel pump being bad, however, I would check the cheap stuff first as I haven't seen a fuel pump cheaper than about $1500.

So, needless to say, it looks like the Mass Airflow Sensor may have done the trick for you, but, I did want you to at least know there is more than one potential as I had a complete loss of power when my car went into "limp mode."

Posted on Apr 06, 2009

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  • 12 Answers

Replace the Airflow sensor.They are problamatic on the tdi vw.It solved the problem on mine

Posted on Nov 21, 2008

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Easy soloution ...disconnect the vacumn pipe going to the valve which sits on the inlet manifold and underneath it is a pipe which runs into the exhaust manifold.dont spray the water one as if you put too much water in you could hydraulic a piston and bend a con rod.either try removing the vac pipe if that doesnt work then remove the valve and block off the connection by making a gasket from a coke can but without the hole in the middle or fill the pipe up with an exhaust putty (gun gum) with a bit of tin foil on the exhaust side .promise you this will cure your problem cheaply .old vehicles never had none of this antipolution stuff on them and they ran ok.also you will still pass the emissions test for the anual inspection

Posted on Nov 05, 2008

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