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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old January 13th, 2018, 13:36   #1
dieslin
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Default 03 tdi with working good glow plugs and wont start in the cold

I have no idea what this could be. I pulled the glow plugs and checked them. They work fine. I put a test light on the glow plug connector and turn the key and they get power. But on cold mornings even if i wait till the light goes out 2 times in a row i still do alot of cranking and it just stumbles and sputters and smokes. Does anyone have any idea?
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Old January 13th, 2018, 14:30   #2
KyleMillione
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Have you checked your static timing on VCDS? Did it just start doing that or has it been going on for awhile?
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Old January 13th, 2018, 14:32   #3
dieslin
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I didnt own the car last winter. But i did adjust the pump timing on vcds and did the hammer mod because both were out of spec
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Old January 13th, 2018, 15:00   #4
maxmoo
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Quote:
Originally Posted by dieslin View Post
I didnt own the car last winter. But i did adjust the pump timing on vcds and did the hammer mod because both were out of spec
That may be your problem.
The pump timing adjustment is done manually and then checked with vcds.
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Old January 13th, 2018, 16:34   #5
JDSwan87
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Quote:
Originally Posted by maxmoo View Post
That may be your problem.
The pump timing adjustment is done manually and then checked with vcds.
I 2nd this^^^... OP, I bet you adjusted the IQ and not the actual timing...

Get the car up to FULL operating temperature and then check your timing with VCDS, adjust manually accordingly
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Old January 13th, 2018, 16:44   #6
94cobra2615
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Starter and battery. if the engine dont spin fast enough it will be a pain to start. Starters get lazy over time and will crank slower as a result
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Old January 13th, 2018, 17:08   #7
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Quote:
Originally Posted by dieslin View Post
I didnt own the car last winter. But i did adjust the pump timing on vcds and did the hammer mod because both were out of spec

And?

You don't say if you had trouble after doing that. I have to assume you were able to get it within spec and all was good until now. When did you do all of this? Was it because it didn't want to start?
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Old January 13th, 2018, 20:50   #8
wonneber
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Quote:
Originally Posted by dieslin View Post
I pulled the glow plugs and checked them. They work fine. I put a test light on the glow plug connector and turn the key and they get power.
How did you test the glow plugs, ohm meter or power them up?
I prefer to test high amperage things with an amp meter.
They should all be the same amperage.
The wrong voltage glow plugs could also cause it. Not sure if your 99.5 has the 2 voltage plugs available or not.
If the connector at the glow plug is not making a good connection the plugs also will not get hot enough.
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Old January 13th, 2018, 21:55   #9
UhOh
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Please, people, provide actual numbers rather than "I adjusted it to spec."

What are the outside/ambient temps? How long does the GP (wait to start) light stay on?

Does it sound like the starter is spinning the engine well? (raised by 94cobra2615) Battery?

Do you know if you've got air in your fuel lines? (should be able to check if you've got a clear fuel line going to the IP)

Any codes?
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