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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old February 6th, 2018, 13:51   #1
Raelynn99
Newbie
 
Join Date: Feb 2018
Location: Canada
Default Car problem

Hi I have a 2002 tdi vw Jetta with over 500 thousand km and it started fine even -30 weather one day I go to start it and I have a hard time getting it started but it started an hour later I go out and it cranks but won’t start we changed the fuel filter and the fuel pump but still nothing does anyone have any suggestions? Thank you
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Old February 6th, 2018, 14:09   #2
Mongler98
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Join Date: Mar 2011
Location: Northern MD
Fuel Economy: Race: 12mpg, Gandma:65mpg
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got a volt meter? check the fuel shut off solenoid (round pill looking thing with a wire on the top) on the IP (fuel pump on the engine) Put the red on the wire and the black on the batery - terminal. DC volts. when the key is on the on position, you must have 12v. if you dont, pull your 109 relay out, tapp it a few times and put it back in. If you test the relay it might be bad, its a standard 5 pin 30/40amp relay you can get anywhere.

Crack open the 3rd fuel injector line with using 2 wrenches and crank if, you should have fuel spraying out of it, just crack it open but not off. If you dont, and the 109 relay is good then your out of fuel in the IP and it needs to prime.
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Old February 6th, 2018, 14:09   #3
BobnOH
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Join Date: May 2004
Location: central Ohio
Fuel Economy: 50/45/35
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What fuel pump did you change, the $800 one?
Lot of things it could be, glow plug system maybe.
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Old February 6th, 2018, 17:02   #4
Raelynn99
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Join Date: Feb 2018
Location: Canada
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Thank you Mongler98 I’m gonna try that and BobnOH the cheap one the one under the back seat
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Old February 6th, 2018, 17:19   #5
muzy
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Join Date: Aug 2012
Location: Southern Alberta
TDI(s): 02 jetta TDI
Fuel Economy: in process
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Are we talking about your 2002? And dose it still have a stock ALH under the hood?
Cheers
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Old February 6th, 2018, 17:20   #6
Tdijarhead
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The one under the back seat is just a sending unit. Your 02 has only one fuel pump and it’s run by the timing belt.

I’m not sure where in Canada you’re located but I hear it can be cold up there, unlike here in northern PA where it’s sunny and seventy almost all winter long. You probably experienced some fuel gelling and now the injection pump (fuel pump) is dry or has air, you’ll need to prime and bleed it. A mity vac works great for this kind of job.
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Old February 7th, 2018, 07:06   #7
Mongler98
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Join Date: Mar 2011
Location: Northern MD
Fuel Economy: Race: 12mpg, Gandma:65mpg
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word of advice, never buy parts untill you find the problem. you need some basic diagnostic tools like a volt meter. you could have tested the fuel pick up vs spending a few $$. treat your fuel once its running just incase this is a jell up.
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