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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKV-A5 Golf/Jettas

VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

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Old April 16th, 2017, 08:08   #1
relumalutan
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Default Engine died while driving, cranks, doesn't start

Worked last night on my car (installed new headliner). When I was done, tried to start the engine, the battery was weakened (could hear the relays clicking under the dashboard). Jump started the car, I drove for like 30 seconds, the car died in the middle of an intersection. Tried to turn the engine on, cranks but no start. Pushed in a parking lot, friend that helped me jump start it came back, tried to jump start it again, cranks healthy but no start.
Scanned with VCDS, no errors.
Dashboards light are coming on (Including glow plug and check engine, I assume relay 109 is working.
I also assume it's not an immobilizer issue, since the car cranks.
Fuel pump relay?
In tank fuel pump?
Maybe the jump start toasted something (still, VCDS scan comes clear)
I'm going to see if the fuel pump works via VCDS testing.
Any help is greatly appreciated.
Thank you.
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Old April 16th, 2017, 08:44   #2
wilcharl
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Quote:
Originally Posted by relumalutan View Post
Worked last night on my car (installed new headliner). When I was done, tried to start the engine, the battery was weakened (could hear the relays clicking under the dashboard). Jump started the car, I drove for like 30 seconds, the car died in the middle of an intersection. Tried to turn the engine on, cranks but no start. Pushed in a parking lot, friend that helped me jump start it came back, tried to jump start it again, cranks healthy but no start.

Scanned with VCDS, no errors.

Dashboards light are coming on (Including glow plug and check engine, I assume relay 109 is working.

I also assume it's not an immobilizer issue, since the car cranks.

Fuel pump relay?

In tank fuel pump?

Maybe the jump start toasted something (still, VCDS scan comes clear)

I'm going to see if the fule pump works via VCDS testing.

Any help is greatly appreciated.

Thank you.


My gut is the battery ... simple but time and time again it seems to fix the problem and is often over thunk

VWs do not like weak batteries



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Old April 16th, 2017, 09:51   #3
tdiatlast
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Not my gut, but my experience agrees. VWs do odd things with undercharged batteries.
Replacement? Experience also dictates OEM...warranty almost equal to other batteries, probably around $150...
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Old April 16th, 2017, 10:32   #4
relumalutan
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The battery is less than one year old, OEM, the one for diesel engine. Last night I had the battery connected to my friend's running car for like an hour. Was cranking just fine, no start. Went back today to the parking lot where I ditched it last night. Took apart the lower driver dash board, tried to figure out which one is the fuel pump relay, no luck. Took the rear seat bench out, disconnected the fuel pump connector to check for 12V while cranking. Connected the voltmeter to the disconnected fuel pump connector, my friend started to crank the car, with the connector removed the car started to run after 2 sets of 5 seconds cranking. I panicked and put the fuel pump connector back in. It runs for now. I'll keep you guys posted.
Thank you for advice. Ruined Easter avoided.
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Old April 16th, 2017, 19:36   #5
tdiatlast
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So maybe the fuel pump connector wasn't making contact?
Hope you've found your problem!
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2014 Passat TDI, 2009 JSW TDI DSG (buyback)
2015 Nissan LeafS ($.02/mile fuel cost)
2014 Toyota Avalon Hybrid Limited (39.5mpg C/H)
2013 Ford CMax Hybrid (39.2mpg C/H)
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Old April 17th, 2017, 05:01   #6
relumalutan
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Quote:
Originally Posted by tdiatlast View Post
So maybe the fuel pump connector wasn't making contact?
Hope you've found your problem!
I'm not even sure what to think anymore: the car was not starting with the fuel pump connector in place, but it started right after I've removed the connector from the fuel pump. I'm confused to say the least. Based on the looks of it, I doubt that anybody touched the fuel pump connector during the life of the car. It seems to be well secured in its place.
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