2009 vw jetta tdi will not start though engine is turnig enough to start

Asked by May 04, 2013 at 02:06 PM about the 2009 Volkswagen Jetta TDI

Question type: Maintenance & Repair

2009 vw jetta tdi will not start.  engine is turning sufficiently and battery is fully charged

17 Answers

1,345

are you getting fuel and spark? you should be getting air

2 out of 2 people think this is helpful.

if you stick the key in the ignition and turn it to the 'on' position, can you hear the pump whirrring before you turn it more to engage the tooth?

6 out of 6 people think this is helpful.

open the hood and put your nose into the shnooker, can you smell gas at all?

1 out of 1 people think this is helpful.
89,785

TDI = diesel engine. No gas smell. No spark. No coil. --- That leaves the glow plugs and the fuel delivery.

6 out of 6 people think this is helpful.
1,345

glow plugs are only for when the vehicle is starting and they only help as it is compression ignition. you still need to get fuel to the cylinder to get it to run do you have a check engine light

3 out of 3 people think this is helpful.
1,345

does your car have an immobilizer? been looking at a few forums and it could be water in the fuel, bad fuel, bad ignition switch or an immobilizer.

4 out of 4 people think this is helpful.
1,345

So it cranks, plenty fast, but doesn't start, have you checked to see if it has an immobilizer, checked the fuel pumps, checked to see if there's water in the fuel, or anything else. Obviously we can rule out your starter and battery.

5 out of 5 people think this is helpful.
180

If I wind it over and over and pump the throttle several time it may eventually start when battery is nearly exausted. But only happens every so often which can leave me stranded.

8 out of 8 people think this is helpful.

you are putting it into the on position and waiting until the glow plugs warm up first, before engaging start? this is diesel 101 here~

4 out of 4 people think this is helpful.
180

Ok thank you .

2 out of 2 people think this is helpful.
180

Tell me about glow plugs . How to identify if it is the problem.?

6 out of 6 people think this is helpful.
180

Very grateful for all your help . Will let you know how we go with it ..

2 out of 2 people think this is helpful.

they won't glow...that's where a problem may happen...once it cranks over and gets running there won't be any need for them...it's a diesel...the amount of compression creates the ignition~

remember "dieseling" when a car won't shut off? same concept keeps on a goin' and a goin as long as the fuel supply is there~

It is called "detonation" where the mix fires without even asking (from a spark)...with a diesel, that should be ALL you have, if it is normal~

420

What was the problem here?

420

If the glow plugs were bad, a fault would have been indicated, and that would have lit the Check Engine light

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