Problem with ECU cutting revs at 4800-5000 RPM.

[Boostfed]

OK I got my car back up and running recently, it was dyno and tuned to 581.9whp and 381 ft-lb torque 28-29 psi B16A 84mm Full Race T67. Well I have driving it and it is great no hiccups or anything at part throttle. Well at full throttle at about 4800-5000 it limits the revs like hitting a brick wall, will not rev past that and also keeping in the throttle will buck really bad but it cuts out and in bucking. A friend touched my Hondata blue box earlier and the led flashed off and in real quickly so we though maybe something was loose, the only thing is the Ribbon wire from the box to the ecu, I checked it and doent seem to be any cuts or shorts in it. Sometimes it will let me pull all the way to redline at full boost but then next try it does the limiting at 4800-5000 again. Anyone experience this before? Could it be in the program? Blue box? Possibly just bad plugs?

[Boostfed]

OK I got my car back up and running recently, it was dyno and tuned to 581.9whp and 381 ft-lb torque 28-29 psi B16A 84mm Full Race T67. Well I have driving it and it is great no hiccups or anything at part throttle. Well at full throttle at about 4800-5000 it limits the revs like hitting a brick wall, will not rev past that and also keeping in the throttle will buck really bad but it cuts out and in bucking. A friend touched my Hondata blue box earlier and the led flashed off and in real quickly so we though maybe something was loose, the only thing is the Ribbon wire from the box to the ecu, I checked it and doent seem to be any cuts or shorts in it. Sometimes it will let me pull all the way to redline at full boost but then next try it does the limiting at 4800-5000 again. Anyone experience this before? Could it be in the program? Blue box? Possibly just bad plugs?

OH to add it feels alot like the BOOST CUT option is turned on BUT it is only intermittent, sometimes it pulls thrpough and sometimes it cuts out.

[turbo_civic_si]

i had a problem where i kept getting disconnected from the s200 unit. mostly when i drove it kind of hard. i ended up soldering the ribbon wire directly to the pins. you may want to try that. but don't know how well warranty would be on doing that. i would always notice the led on the s200 turn off and on and at the same time i would get disconnected. and for some reason i would disconnect my pocket programmer, data log cable, or my laptop from the charger, the car would shut off (bad ground on s200). so far since the soldering, haven't had any problems. possibility, but who knows.