Rough idle & stall

Hello all,

4th of July morning my 2011 VW GTI had difficulty starting. It took 3 button presses to get it to turn over. The first time I felt may be I didn’t hold the button for long enough but it still didn’t start until the third time. Yesterday morning I stopped to get some coffee and when I started the car it had a rough idle and then stalled. It started right back up without issue. So I did a scan this morning (see below). I do have staging enabled so I’m not sure if the error code is related or not. The engine not turning over has happen before but the last time it thru a CEL which went away the next time the car was started. The dealer preformed a scan the last time this happen but never found anything. Any ideas as to what the problem may be?
Thanks,
Staudie

Friday,06,July,2012,07:09:52:46537
VCDS Version: Release 11.11.3 (x64)
Data version: 20120401



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Chassis Type: 7N0
Scan: 01 02 03 05 08 09 15 16 17 19 25 2B 2E 37 42 44 46 47 52 55
56 62 72 77

VIN:

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
2B-Steer. Col. Lock -- Status: OK 0000
2E-Media Player 3 -- Status: OK 0000
37-Navigation -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
55-Xenon Range -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine (CBF) Labels: 06J-907-115-CBF.clb
Part No SW: 1K0 907 115 AQ HW: 1K0 907 115 AK
Component: 2.0l R4/4V TFSI 0030
Revision: E3H25--- Serial number:
Coding: 040301081C070160
Shop #: WSC 01357 011 00200
VCID: 75CF38BC1CDA171

1 Fault Found:
005386 - Engine Off Timer Performance
P150A - 000 - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 1
Mileage: 1048575 km
Time Indication: 0
Date: 2111.15.31
Time: 31:63:63

Freeze Frame:
RPM: 243 /min
Load: 88.2 %
Speed: 0.0 km/h
Temperature: 29.0°C
Temperature: 33.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 10.541 V

Readiness: 0000 0000

It may be the coils man, judging from what i have read and seen, the coils fail on these machines. I would run an ohm meter to check for voltage from the coils and go from there. May be something as simple as a mis-seated coil in which you just have to unplug it from the spark plug and slide in back on.

Also, did you do anything in sort of mods that may affect sparks plugs, coils, electrical work, VCDS coding? If so, these may have shorted a fuse. If you changed something in VCDS, code it back to stock, and see how it affects your car.

@ 10.541v the voltage looks low!

Do you have a modified or stock intake? I'm asking because I installed a APR Carbonio 1+2 intake on my car and a few days later had the exact same problem. I found that one of the connections on the tubing wasn't completely secure and there was a gap. The result was the engine not getting enough air, thus a rough idle and stall.

mrlapou said:

@ 10.541v the voltage looks low!

Click to expand...

I would rule this out before digging deeper

Double's Dub: I only have a these VCDS mods (Gauge sweep, windows w/ fob, Unlock confirm, comfort turn signal, Tear Drop Wiping)

Squashdaddy: I do... Ill take a look, Thanks

rotomoto: Yeah, concerning. The dealer tells me he had a car with a loose battery/starter cable which has similar issues.

Its lined up for tech line on Wednesday. Tanks all

check out these 2 threads.
http://www.golfmk6.com/forums/showthread.php?t=10133
http://www.golfmk6.com/forums/showthread.php?t=21459
urs sound like those problems.

Im curious whats the cause tho. mine stopped doing it for a while and then it came back recently.

Hey, me too!

Staudie:

Your story sounds familiar. Just got mine fixed at the dealership (hopefully). Here's how it went down. Hope this helps.

I had the same stalling problem happen to me the first time about a month ago. Started car, it wanted to stall, stayed around 500 rpm. When I tried to put the DSG in reverse, it wouldn't link up. I shut it off, turned it back on, and it ran great for two weeks.

Then, completely unrelatedly, my AC quit working about two weeks ago. Brought it in, and the dealer found an AC hose had been cut by an adjacent hose's clamp whose screw vibrated against the AC hose over time. It's very similar to what's discussed in this thread:

http://www.golfmk6.com/forums/showthread.php?p=648220

The dealer replaced the hose, moved the hose clamp, and charged the AC system under warranty. I arrived to pick it up a few days later.

When I got there, a service manager brought the car around. I got in, started it up, and the stalling action happened again. This time it was even worse, complete with rough idle and eventually the engine dying. I couldn't believe my luck that this other problem re-emerged right in front of a dealer. The service manager tried to start it again, and it did the same thing, complete with CEL lights flashing. The dealer immediately ran a diagnostic on it and got no codes. They turned it off, turned it back on, and it ran fine again.

So the car went back into the shop, and they tested the fuel system with pressure gauges. What they found was that when the car was turned off, the pressure in the fuel system downstream of the pump would drop over time. They also saw some high amp readings going to the fuel pump during operation. They weren't sure if it was the fuel pump or the fuel pump control module, so they replaced both under warranty.

I don't know what the problem was exactly, but if pressure was leaking back across the pump, it may have been a bad check valve. I've had it back for a few days now with no problems. If I have any more issues, I'll post about it.

I forgot to note that to me having fuel leak back across the pump would make sense in explaining an issue that only arises during startup. I'm guessing that it just causes the engine to starve for gas while the fuel line is filling up during startup.