I Have a 00 Si with S2 stage 2 cams with full S2 valvetrain and a Hondata S100 Ecu

the problem is that i will be driving and all of the sudden the car will start studdering at around 2000 - 2500 rpms and then the car wont Rev above 4000 rpms, it will jump back and forth between 4000 to 3000, almost like it is hitting a rev limiter

I think that there is a prblem with the Ecu because when this happens i will turn the key to the off position and then back on and it will work fine again

What do yall think

 

I got my hands on the stock Ecu if i put it in will anything major happen to the motor

 

have you had the car tuned? if so consult your tuner. if not get i tuned. also if you put in a stock ecu the maps would be different to the the ecu your have moreso if it was modified. this may result in the car leaning out with a stock ecu cause with bigger cams than stock the will need more fuel and more fuel needs more air.

 

What kind of engine management are you currently running?

 

S100 tuned by John at LHT

 

Actually my EK did the samething once. It was the main relay acting up. I unplugged it and plugged it back in. Check the ECU also to make sure no water or anything got in it. I had the problem once also.

 

ill try that man thanks