JRSC was installed way back. No initial problems.(everything else is stock.) But lately I started to have this problem where my car would start to violently shake/hesitate when I hit the 5k mark almost every time. Then it's fine again all the way to redline. I shift the gear up and it'd happen again at the same 5K mark. I initially thought it had something to do with YRFO flashed ECU regulating the fuel injection at 5k mark for the DSI setup, even thought I no longer use it. Today the problem worsen as I now have it happen at random RPMs. I even went to the last gas station & made them test octane level from the pump I used last and it turned out fine (just over 93.) Car is at the dealers now, but their initial computer scans showed nothing. They're charging me for one hour of labor to look into it further, even thought the car only has 25k on it. Any idea – I’m dying here….
