Boosted LSVTEC cutting off in 4th gear

[Clint_001]

Hi Guys,

I'm having a weird problem yesterday at the races. My 1st qualify round went all the way from 1st through 4th gear without any problems, but on the 2nd round I raised my launch rpm to 7500rpm instead of 7200rpm.

The car ran good in 1st through 3rd but kind of hit a rev limit around 7300rpm.

My setup is a 83mm LSvtec turbo running ID1000cc injectors 6765 turbo, ITR cams, S300, Hondata 4 bar map sensor, walbro and bosch inline fuel pump tuned on C16

I'm clueless to what could be causing this. Please let me know what you guys suggest.

[Hondata]

I have seen something similar from a combination of high rpm (over 10,000) and distributor noise (often aftermarket). The ECU detects errors at a rate not high enough to give a check engine light, but seems to run in a partial limp mode.

[Clint_001]

I'm running a M&W pro 10 ignition box with a crane ps92 coil.
I've had miss firing issue at first with the stock ignition system but once I switched to the M&W box it went away and didn't have any issues until yesterday. Not even on the dyno when I dynoed in 4th gear.

@ Hondata or any experienced tuners: Have you gone through my parameters to see if there could be anything unusual that could be causing the cutting off in 4th gear?

[locash]

Your TPS reading went away, probably causing the issue..

-joe
Locash Racing