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I already noted that they said that there ARE NO codes. If this was that easy, I wouldn't be reaching out for some less obvious causes....I'll mention the TCCS suggestion though. Thanks.

Well it was "we"until this turned into a diagnostic problem...I supplied the $$$ and hardware.Non-emissions JDM Engine&trans,Clutchmaster's clutch,HKS boost controller, new intercooler and radiator,NGKiridium plugs,RC 550cc injectors,Lexus afm, silicone hoses, tubes, K&N intake,ARP head bolts...

What I know is that they have stand alone diagnostic monitored test equipment for confirming injector and spark firing orders etc.,along with the newer stuff. They think it's too much fuel or it isn't fully igniting, but why 2,4,6 is the mystery, and I guess there isn't simply a code to confirm.

There aren't any codes. They've hooked it up to their scanners and machines and are trying to narrow it down to a mechanical issue. All the sensors checkout and the firing order all confirmed.They suggested that I send the injectors back to RC to be requalified since they were sitting around for...

There aren't any codes. Not even a check engine light.

You might not believe this, but I had a rod knock noise around that RPM and it was a loose harmonic balancer.I assume it wasn't wasn't assembled right after a timing belt replacement (like forgetting the key?) I didn't do it.

I'll suggest that, but could you elaborate?

Completed a 7mGTE JDM engine swap in my 87 Supra turbo, but have ignition firing issues. We installed 550 cc RC's (soldered RC connectors) and the Lexus AFM (Fabricated the custom Air Screw as recommended).We also retorqued head to 85 lbs, with ARP Head bolts.After initial richness and black...