I have a 2002 WRX. Relevant mods are:
Invidia catless downpipe
NGK2667 (one-step colder) plugs
Walbro 255 fuel pump
I had been running a Cobb OTS stage 2 tune for a while after the downpipe, but decided to move up to an e-tune. In the process of tuning and logging, the tuner has told me that I am dealing with a lot of "misfire". The DAM is constantly dropping to 8 or 9 and moving around 8-12 and sometimes up to 15. There are no CELs.
I installed the plugs and fuel pump this past weekend right before flashing the preliminary e-tune map. I checked some previous logs from my old plugs that I hadn't reviewed yet and noticed the same issue, so I've ruled out the plugs being the problem. I also ruled out the pump obviously, and I replaced the fuel filter a week ago. Things I'm going to check now:
Compression and leakdown tests
Vacuum/boost leak test
Coil packs (how should I test these?)
Rattling parts setting off knock sensor
Cam timing and sensor cleaning
Here is a log with default params from before the plugs and pump (with Cobb stage 2 OTS tune) with a WOT run somewhere in there:
Here are some logs I sent to the tuner:
Around the block log: https://docs.google.com/spreadsheet/...2QWVia2c#gid=0
Idle log: https://docs.google.com/spreadsheet/...WUVJIV2c#gid=0
WOT log: https://docs.google.com/spreadsheet/...4TjRDTVE#gid=0
These are not the default parameters, so let me know if I should do another log with other params.
Anyone have any other ideas or indications of specific things I could look for?