2014, July 17 - Modded intake manifold and throttle body so I could rotate the intake manifold. *Everything is just mach-fitted onto the engine to get charge piping fabricated this weekend, gaskets will go on before final assembly. Click HERE for more pics (imgur).
2014, July 18 - Couple odds n’ ends, mached up everything in the engine bay to get charge pipes fabricated the following day. *Everything was just mach-fitted onto the engine foir charge pipe fabrication, gaskets will go on before final assembly.
I have 5k on the built engine, started getting misfires on a cylinder or two around 1k ago, but has gotten progressively worse over the past 1k miles. Now its regularly misfiring on all cylinders. No other codes thrown, just cylinder misfires.
Done so far;
-Compression 10:1 - 154, 155, 158, 155
-Replaced plugs during compression test.
-Sent injectors to DW, just put replacements back in, issue remains.
-Checked spark, coils OK.
-Checked crank sensor, cam sensors.
-Map revisions from tuner (Will Knose).
Symptoms are obviously misfiring, primarily under 3k RPM. Also cannot hit 23 Psi boost target, only get up to 19-20 tops.
Things I've noticed;
-Forge BPV (no longer recirculating as I'm speed density) leaks a little at idle, even with the stiffest springs. Anyone advise of a replacement that would utilize the OEM flange style?
-I noticed the servo motor in throttle body doesn't seem to buzz/humm as consistently as I remember it doing when I first noticed it and questioned WTF it was. But this was after my car sat for 2 weeks on a dead battery and was connected to my other car's battery, while the STi wasn't running yet.