Question about 2002 Volkswagen Jetta TDI

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2003 TDI 160,000 km, manual transmission

Engine quit after making a 90 " corner on gravel road. Engine cranks OK, check fuel to injectors but pressure to low to open injector. Filters ok, shut-off valve ok, no faults as indicated by scan tool.
Question, does the ECM control the injector pump and if a failure of the T-30 power supply relay?? cause the pump rack to return to a neutral position and therefore prevent the pump from generating adequate fuel pressure to open the injectors? Or is this a mechanical problem in the injector pump?
Some assistance would be most helpful as it is winter here and need the car.

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Hi, I realy believe you are low on full & by making the turn you got air in the system. Add fuel, then get an assistant to cranck the engine for you while you blead the injectors throughly. One by one, till you see no bubbles coming out. If you have air in the diesel, preasure will be very low as you described. Hope that does it.

Posted on Dec 11, 2008

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Reset fuel pump enersha switch in trunk?

Posted on Dec 08, 2008


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90 model Plymouth grand Voyager cranks no fire replaced coil and SBEC

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There is no throttle body on a TDI, but continuing to crank you engine with no fuel pressure will absolutely fry your pump and/or injectors (An '03 could be either an ALH or a PD engine, - different fuel injection systems, but same disastrous result in either).
Here's my .02:
DO NOT let a VW dealer touch your TDI. They commonly throw parts at it until the problem either goes away or they throw up their hands and say "I dunno". Either way, people routinely waste a boatload of time and money with no relief when taking their TDI to a VW dealer.
Go to and look for a trusted TDI Guru near you (there's a list by state) and have one of these guys look at it. They're very helpful and more knowledgeable than 95% of VW dealers.
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My 1997 gmc 1500 suburban will not run but it pulls no dtc codes on the cpu

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2 Answers


If you have good fuel pressure. Check for spark at any plug while cranking, If no spark, also place a screw driver on an injector and listen to it while someone cranks it over. If you have NO spark and NO injector click - crank sensor needs to be replaced. 95%
other 5% hmmm wiring problem on / near crank or cam sensors, theft system active, dead pcm.......

Mar 15, 2010 | 2005 Dodge Caravan

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Check the fuses/relays for the fuel pump and make sure you are getting gas to the fuel injectors. Also check your fuel filter....if it is clogged it could be stopping the gas from getting to the injectors....good luck

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2003 tdi automatic transmission seems to be not shifting properly

I'm going to guess you have a clogged intake. See this site:

You can clean it yourself by removing the intake and powerwashing it out. If a dealer does it they will way overcharge you. You might need a new EGR valve too since that might be clogged up too. There are a lot of tutorials on the web and it isn't that bad of a job. Just make sure you wear gloves.

Aug 01, 2008 | 2003 Volkswagen Jetta TDI

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