S2000 Hitting artificial rev limit/power cut randomly above 6200 RPM
Posted: Mon Jul 07, 2025 8:22 pm
I have an issue with my 2003 S2000 running Kpro v4 Serial number 40523.
The car has been randomly hitting a rev limit/power cut above ~6000-7000 rpm, especially when the car is fully up to temp or hot from a drive. I've checked everything I can think of including the spark plugs, plug gap, coils, map, TPS, O2 and TDC sensors. I've also asked a mechanic to check over the car and he said he can find nothing mechanically wrong with the car. Now I'm stuck trying to figure out what is going on since there is no CEL and no code.
The power cut/rev limit happens randomly but I did manage to get a data log of it happening twice. I've attached the log and my map. Any suggestions on solving this problem are welcome.
Here is the list of mods on my car...
Hytech Header
Hytech Exhaust
SoS Stage 2 (AEM) Intake
93 Octane tune
Hondata Kpro v4 Serial number 40523
Science of Speed Tuner kit
3.8 Pulley
Hondata 4 BAR MAP
DW 1065 injectors
Sooon Venturi 70mm bore/66mm butterfly
The car has been randomly hitting a rev limit/power cut above ~6000-7000 rpm, especially when the car is fully up to temp or hot from a drive. I've checked everything I can think of including the spark plugs, plug gap, coils, map, TPS, O2 and TDC sensors. I've also asked a mechanic to check over the car and he said he can find nothing mechanically wrong with the car. Now I'm stuck trying to figure out what is going on since there is no CEL and no code.
The power cut/rev limit happens randomly but I did manage to get a data log of it happening twice. I've attached the log and my map. Any suggestions on solving this problem are welcome.
Here is the list of mods on my car...
Hytech Header
Hytech Exhaust
SoS Stage 2 (AEM) Intake
93 Octane tune
Hondata Kpro v4 Serial number 40523
Science of Speed Tuner kit
3.8 Pulley
Hondata 4 BAR MAP
DW 1065 injectors
Sooon Venturi 70mm bore/66mm butterfly