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My fault codes show misfires on cylinders 3 and 6 only. It has a 1 bar tune , unknown tuner, tubi exhaust, AWE headers. About every 200 miles, CEL lights up, I drive to indie who is an air cooled mechanic , and works on water cooled cause he has to, and tells me to come back when light comes on. I know mike schatz is at tre motorsports, so that is my next stop. The car runs very good, but I have nothing to compare it to. Not close to a 930. i read articles on this forum and wished I lived around the corner from Loren. Read articles on rennlist, 6speedonline, call my indie, and ask him if this or that would cause misfires on 3&6.... no that’s not it. Hopefully it isn’t serious, but I’ve driven lots of Porsche’s, hot rods, etc and it doesn’t make any weird noises, runs pretty good gets to 1 bar pretty fast. Its very frustrating anyone else with a 3 , 6 misfire? thanks , Kevin
Out looking for fault code scanner now Thanks for the common ones. Im slightly irritated at my indie that he hasnt been more forthcoming with codes that show up on his handheld. Like hes actually spending time diagnosing problems, when the codes are right there. I hate to say harbor freight, but their Zurich gets high ratings for a buck and a half.
I just picked up a well taken care of high mileage tt, so I had new plugs coils, both diffs serviced, oil service, brake flush so I now have a baseline. about 50 miles after service, cel pops up. shows misfires on 3 and 6 cylinders. car runs excellent however. ive been using my indie for 20 years and he is a turbo specialist(built a 935 for a shop car). hes stumped because the car runs so well. it does have a 1 bar flash, tubi exaust, awe headers. I don't know what company did the flash though. im wondering if the MAF sensor may be fouled, or the flash on ECU is to blame. This is my 1st 996 tt, very different from my 930s. Am I missing something obvious? should I send my ecu to a reputable Porsche tuner? any and all advice is very welcome. The car is a blast to drive...pss9s front and rear aftermarket adjustable anti sway bars and drop links, handles very well. But the CEL is driving my crazy.