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General VW Discussion This is a place for General VW topics (the company, not your vehicle). General topics about a specific vehicle should be posted in the General TDI Dicussion Forum sections for that vehicle platform. A4, A3 & B4, B5, etc.

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Old October 6th, 2017, 05:18   #1
Brauvura's Avatar
Join Date: Nov 2014
Location: Missouri
Exclamation 2012 VW GLI help please

I have a 2012 VW jetta gli 2.0 turbo dohc 6 speed transmission. We've replaced ignition coils, spark plugs, fuel filter, had injectors cleaned, still runs rough. Engine light blinks a few seconds and then stays on. I haven't driven it in weeks because I dont want to mess it up! We buy only OEM parts. I've talked to people and they think it might be electrical, but it's a guess.
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Old October 19th, 2017, 19:13   #2
Powder Hound
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Join Date: Oct 1999
Location: Conkud, New Hampshiyuh, USA
Fuel Economy: pretty freakin' good.

My advice: 1) find someone with a Ross-Tech VCDS dongle and get a good read on what the ECU is complaining about. That is an order of magnitude better than guessing.

2) This is a diesel forum. While people here like to help, admittedly most people's expertise will be in the are of compression ignition engines, hence the lack of response.

3) You might find better info at vwvortex.

Good luck, and


You always pay for what you get. Sometimes you get what you pay for.
It is called dope because it does make you dumb.
Thinking outside the box is difficult for some. They're afraid they'll fall off the edge of the box and be lost to oblivion.
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Old October 27th, 2017, 09:32   #3
Loose Nut Behind the Wheel Vendor
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Join Date: Apr 2006
Location: Vallejo, CA

Does it smooth out at all after the engine has warmed up?
Sole Proprietor, Diesel Autowerks in San Anselmo, CA. One man operation, email is preferred method of contact: email me with inquiries for service.
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Old October 27th, 2017, 09:50   #4
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Join Date: Dec 2001
Location: St Louis
Fuel Economy: fantastic

Intake ports gunked up would be my (very experienced with these) guess.

Very common, I do these a LOT.

You also have to check the crankcase breather valve. Those fail a LOT too.

Where in Missouri are you?
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