2011 Jetta TSI
APR Stage3/CTS FMIC/Forge Pipes
Word on the street is both cars are working. Let's give it the weekend to see if anything changes. Once the engineers get back, I'll have all the details and I'll fill everyone in.
following up with my 07 FSI GTI k04, new OEM iridium spark plugs gapped @ 0.028 (instead of 0.032) + 4 new coils and it's still hesitating right at 6500 rpm or so, just for a fire or two, never throwing a CEL. I did notice a small amount of oil in the coil/spark plug area, thinking thats a valve cover gasket. The misfires, or whatever they are, are becoming less and less noticeable after changing plugs + coils, but its still there. I'm not using an aftermarket intercooler, and only have aftermarket downpipe right now (intercooler is on its way).
Gonna take it back to APR rep on monday and see what they can find. Maybe a faulty injector or something... COULD be a lot of things, is there anything that sticks out or seems more likely with the FSI k04 ignition errors? I'm not going into limp or getting any CEL's, just some hesitation around redline. Any/all help is appreciated, thanks again to the APR reps for working their butts off.
Last edited by atromos; 10-06-2012 at 03:46 PM.
Honestly, reading about what appears to be some obvious issues with the install as the first update, apr found, to this thread has me concerned with the knowledge of the installers and OP in regards to how this vehicle operates to begin with. Even after "8000 miles", simple things were not addressed before slinging mud at APR.
Props to APR regardless of the outcome of the underlying issue causing the misfires, for stepping up to the plate on this.
Coming from an Audi/VW tech with 7 years experience. I've installed a few of these kits as an apr dealer. They do a great job of trying to take the guess work out the equation.
Euro Pros Auto Repair
It'll be very interesting to see what the final culprit was. Clearly there were mechanical issues allowing unmetered air into the k04 for as much as 8000 miles with presumably lots of wot runs logging and testing. I hope for op's sake that he hasn't damaged his motor. The fact that fixing this didn't cure the misfires does not bode well.
Last edited by ryan mills; 10-08-2012 at 03:59 PM.
As the reports came to me it was a software issue, for the privacy of APR I won't give details.
I waited a few days to post because....10 miles after I picked the car up MISFIRES! They drove the car quite a bit, and said they couldn't get it to misfire, but it happened to me on the 405 on the way home, in Drive (not Sport or Manual mode.)
DJM made contact with APR and they wrote a new file for me. I've tested it a bit and so far so good! We may have a solution! It seems the problem stemmed from a failure to shift in third gear. This explains why it was not as prevalent in manual cars.
The unmetered air came from a coupler that turned out to be poor quality and had relaxed after all the heat. I bought the "stage II" intake pipe from a small company; trying to help the little guy. I'll get a better coupler and put the pipe back on. I'm running a cracked Carbonio with tape over it (APR's deciscion).
In the possible end, I'm glad APR is attempting to provide the product they sold me, and many others. We may finally have an answer to this mix-up.
READER'S DIGEST VERSION:
-Was not hardware in any form
-Was an obscure line of code somewhere in the software
-FIXED for manual cars
-Nearly fixed for DSGs.
It all started with the '11+ CCs and 12+ GLIs having a different computer, then continued when the software map was a little different between those cars and the GTIs (who as far as I know never had a problem). APR had their top mechanical tech and top software tech on it for two days. You should be safe.
From what engineering said, the misfires really didn't make sense. All data appeared perfect, right until they occurred. It was like hitting a brick wall and would not shift out of third (DSG). The misfires were on one cylinder, 3rd gear, right near redline. (Manual shift fine, automatic shift, not fine). They swapped the coil packs, spark plugs and injectors and the misfire did not follow. They checked for carbon buildup and it was fine. The MAF was unplugged to help rule out any leaks (Some were found and fixed), but there was no change. The car was run very lean to help rule out a fueling issue, but there was no change. IIRC other hardware was examined too. It's possible it could be mechanical, such as something in the head / valve train like we've seen on some FSI models with incorrect valve springs from the factory, however we don't have any data to support that and I don't want to assume that's the case and cause mass hysteria. We have people reporting misfires, and we have people with the same cars / transmissions / ECUs reporting no misfires. We even have our in house MK6 GLI MED17.5.2 with a stage 3/3+ (prototype) turbocharger system, on stock injectors, with no misfires what so ever (IE, higher power levels, more demand on the system). I would only expect misfires on higher power vehicles, so stage 1/2 should not have any issues at all, and we've had 0 reports from what I gather. In the end changes were made to get the car to a point where it would not misfire. IIRC, when the engineers left (Had to leave), it was fine, however they wanted to see if anything would change over the weekend (which it did) so the other files were updated. I have a few other people testing now. We'll be looking to get another car in house to dig into this future to find out what's going on.
So, if anyone has the misfire issue, please send me an email, and I'll get the updates out for you to try. email@example.com
Last edited by Arin@APR; 10-09-2012 at 12:22 PM.
Happy to know that the issue has been fixed, after all the comments about.
Since the beginning some of us believed that was an ECU issue, only in the MED 17.5.2 due to a lot of reasons explained through the comments.
Living and learning......
Passat B6 Wagon 2012 TSI; APR K04;DP 3",cat 200 cels;turbo outlet pipe;APR carbonio;VCDS;
2012 GLI DSG
UNITRONIC TUNED K04 - Carbonio intake - UNITRONIC TBE - APR FMIC - Neuspeed TOP - HPA SHS Coilovers - HPA Red Motor Mount