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    Thread: Car Died on me

    1. Junior Member
      Join Date
      Jun 7th, 2018
      Location
      Mt Marion, NY
      Posts
      76
      Vehicles
      2012 VW CC Lux Plus
      10-08-2019 08:33 AM #1
      2012 CC Lux +, 123,000 miles, DSG 2.0T

      Had a crap weekend. Car stalled on me while rolling through a toll booth on my way into work. EPC light and flashing CEL came on, car ran very rough (like it was missing). Pulled off and shut it down, let it sit for a minute and then restarted, ran like a champ, no more lights. I let it idle for a few minutes and nothing else happened so i headed off to work. Checked for codes later and of course nothing since the CEL was not lit (I do not have a VAGCom cable, just a basic ODB-II reader).

      Fast forward to Sunday, I did a quick bit of maintenance that was due: oil and filter, air filter, basic inspection. I checked the seating of all the coils but did not remove any. Car ran great, nice and smooth. I was going to pop the timing chain tensioner inspection cover off, but opted not to do so until I have a replacement cover, not wanting to potentially create an oil leak if I damage the old one...I do not know at this time if I have the new or old style tensioner, but plan to find out before my motor grenades itself.

      Ran my kid home to his Mom's house and started my trip home (130 mile round trip), about a quarter of the way home I was cruising around 40mph and it started missing again, EPC and flashing CEL. I made it to a pull off and tried the same reboot the car procedure to no avail. The car would crank and crank but would not fire. Had my code reader with me still so I checked the codes, now getting P0100 and P0303, so MAF and misfire on #3. I unplugged the MAF and tried again, still cranks but would not start. I could smell unburnt fuel around the car so I opted to stop trying, not wanting to also damage my cat by filling it with gas.

      Got a ride home, went back the next day with a trailer, tried to start it, still no fire. Loaded it up, got it home and tried to start it on the trailer, it started to cough a bit and after a moment of cranking it caught, ran like crap for a minute like it was still missing and then it smoother right out and I was able to back it off the trailer and drive it into the garage, now running normally.

      Pulled the codes once more this morning and I still have an active P0100 and P0303 and a pending P0303. I have no problem replacing the coils, they've got at least 50,000 miles on them, likely quite a bit more than that. MAF is easy enough to replace too, maybe I dislodged something in the air tube when I was cleaning it and one of the wires got damaged. But whats troubling me is that it wouldn't even fire at all, which it definitely should with one bad coil...but it was acting like it had zero spark. My first thought was maybe my timing chain tensioner went, but I've got no racket coming from the motor and it did start and run smoothly later...I can't believe the chain could slip out of proper timing and then later pop back in. Also wondered about carbon buildup, if it might be giving me air intake valve problems, but again I'm not buying it...I've had none of the cold start symptoms people talk about and again, it did run and only was throwing the #3 cylinder misfire, no others.

      The dying and no start while hot behavior is acting very much like my Saab and my friend's 03 Passat did when he had a bad crankshaft position sensor, and that would neatly explain the no start and now starting and running smoothly issue...I had the same sensor go out on my 04 Saab as well. Are the 2.0T motors prone to CPS problems? Other people have this issue?

      So, wondering if others have had similar issues and how you conquered them, also wondering what are the optimal coils and new plugs I should be installing on my car...its 100% stock, no mods and I have no intention of modding anything, its just a daily driver. I'll assume OEM for the MAF and CPS if I buy those?

      Thanks in advance.

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    3. Member
      Join Date
      Jan 27th, 2013
      Location
      Austin, TX
      Posts
      2,928
      Vehicles
      2010 CC 6Speed MT, 2019 Tiguan SEL
      10-08-2019 10:24 AM #2
      I don't have experience with your exact problem but I think new coils and spark plugs is a good starting point. My original coils went out around 80K. It was nothing like you described. I only noticed it when I did a routine scan. I replaced the coils and so far now misfires. I also had carbon cleaning done at 55k, not sure it this is your problem but can definitely contribute.

      At first I thought you might have some fuel delivery issue but then you mentioned that you smelled lot of gas, so maybe fuel delivery is ok . I know there is a recall on the fuel pump module. The original module was prone to cutting out when it got older and very hot. Check your VIN and get the recall done regardless.

      One more thing, Is the real main seal ok? No leak?


      For the coils I went with the "red tops" from Audi. Apparently they are more durable because they are meant for more horsepower audi engines

      OE:
      https://www.shopdap.com/make-model-y...si-engine.html

      OEM:

      https://www.shopdap.com/make-model-y...2-0-t-tsi.html

      This is just a reference you might find better deal for those which will include spark plugs as well. Note, don't cheap out on spark plugs. Only get OE Bosch or OE NGK spark plugs.

    4. Junior Member
      Join Date
      Jun 7th, 2018
      Location
      Mt Marion, NY
      Posts
      76
      Vehicles
      2012 VW CC Lux Plus
      10-08-2019 11:55 AM #3
      Thanks for the quick reply.

      My RM seal should be good, it blew out on me in January when my PCV failed, I did get similar symptoms with the misfire code, but that time it was roaming around to the various cylinders and I had a hard P0300 in the mix. RM seal was replaced by a local VW specialist along with the PCV. I've logged a good 25000 issue free miles since then.

      I'm going to replace the CPS regardless, cheap insurance and I'll use a Bosch sensor hoping it'll be reliable, it may or may not be flaky, but they're relatively inexpensive. Additionally I'll swap my #3 coil with another and see if the code moves to a different cylinder. Figured I'll pop them all out, check for oil in the plugwells and check the condition of my plugs at that time...think I'll definitely be swapping plugs now as well, checking my order history I see I installed Autolite Iridium plugs back in January when I was chasing the misfire codes related to my RM seal...they're not OEN so I'll swap them out...I'll check the ECS specials for ignition and see...if the misfire moves with the coil and the plugs look ok, I'll be inclined to do the coils too and just pick up a red coil special.

      How about the MAF code? Red herring or is that likely bad? Easy to replace but I hate just throwing parts at a problem. I'm not 100% convinced its the source of my problems, might hold off since I know you can start and run without it being plugged in...might just be a second issue? In all the years I've driven and cars I've owned, I've never once had a MAF go out on me.

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    6. Junior Member
      Join Date
      Jun 7th, 2018
      Location
      Mt Marion, NY
      Posts
      76
      Vehicles
      2012 VW CC Lux Plus
      10-10-2019 02:26 PM #4
      Story update:

      I've done very little with the car once I got it home and tucked into the garage, have too many irons in the fire and since I have access to a spare vehicle its not life changing to not have my car available. I've ordered a replacement crankshaft position sensor, set of NGK OEM temp plugs (all due tomorrow) and a set of the current revision Bosch R8 coils with the insulators...I suspect that my coils are probably original to the car, or if not, they're certainly at least 50-60k miles old.

      Additionally I've opted to check out the OBDEleven Pro scan/programming tool and see if I like it. I'm not crazy about having a VW only scan tool but the $80 is far more palatable than the $300 for a VagCom to me, plus I'm not very likely to do much in the way of modding the car's behavior apart from enabling the window up/down feature from the remote.

      So we'll see how it all comes together.

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