Thanks for replying. That's amazing you're using the 2" pulley.

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Did you ever reset the computer after installing the new pulley and retuning?

Yes, many many times. Sometimes I disconnected the battery completely. Other times I would remove both EFI fuses and wait 30 seconds before putting them back in and starting it.

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Do you still have the "free FMU" setup connected or did you disconnect that once you did the fuel upgrade kit?

Yes. The "free FMU" is the routing that makes sense to me. Should it still be connected that way?

My original intention was to have about a 6-7% smaller pulley to make it seem the same at this altitude as a supercharged 4Runner at sea level with a URD kit. The max psi I've seen on the TRD boost gauge was 8-9 psi with the 2.3" pulley, versus about 6-7 psi with the 2.4" pulley. (Just for interest sake, I can only get to 4 psi at 14,000 feet).

Do you have any ideas why I'd be getting misfires at full throttle despite an air/fuel ratio of 14.7? What possible things should I look at?

Jeff
2000 4Runner SR5, supercharger, rear e-locker, ARB front locker, 285/75R16 MT/R's, custom bumpers & skids
2007 Tacoma double cab 4x4 - stock