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Discussion Starter · #1 ·
I have a 2004 Wrx with a 2007 wrx sti block (so I’m told but think it’s ej 255) and 2014 wrx sti head. (Also think it’s just wrx) Now I have a misfire in cylinders 1,2,4 but it seems to jump around. I’ve changed coil packs, spark plugs, and kind of checked the wires. The car runs perfect until it hits about 8psi but is tuned for 24psi. Here is the mod list the last time the CEL came on was right after filling up and turning the car on. It’s been a huge headache for me the last few months.

Perrin turbo inlet
Perrin intake
Sti tmic
Injector dynamics 1000s cc injectors
Ported and polished VF39
2014 wrx sti heads resurfaced (26,188 miles)
Ej257 rebuilt to stock by solid motor works (26,188 miles)
Killer Bee 🐝 pick up tube
Killer Bee 🐝 oil pan baffles
Tomei headers
Tomei down pipe
Tomei catback
Blue gates timing belt
Blue gates serpentine belt
ACL 12mm oil pump
Kartboy solid engine mounts
New knock sensor (0 miles)
New oil pressure sensor (0 miles)

(p.s. no idea what fuel pump is in the car. But I believe it’s a walbro 255)
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