Engine Stumbling, No Codes
Greetings wise and gracious forum members,
I have a 2013 BRZ that I have been struggling with for some time now. I was driving it on the OFT tune, stock headers. I had the valve spring recall done and the first dealer messed something up, so I took it to another dealer and they supposedly fixed it via a master technician. I told him to throw new spark plugs in while he was in there. It was fine after that for more than a year but then it started having the "firecracker" sound under the hood. I found the Counter Space Garage maintenance guide and replaced the Coil Packs with the quad spark ones they have. Maybe they're not good. I read on here the stock ones can fail on early cars.
It was still popping so I sent the injectors to be serviced and seals replaced as on early cars, they can fail. Once it was put back together, no more firecracker but it had a misfire. I figured out it was a port injector so I replaced it. Now it's occasionally stumbling under load once it's warmed up, but there are no codes. I have replaced the 02 sensor and checked the MAF sensor to clean it and found the plastic was broken, so replaced it. I recently replaced the fuel pump and sock filter, all to no avail. I ave also tried reloading the tune and the stock tune.
What's the best way to post my OFT data logs? The logs are me driving up a mountain road with the weird stumbling happening sometimes. I know some stuff from reading on here but nothing stands out to me as an issue. Sorry for the essay. Am I missing something obvious?
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