Hi guys, I recently had my first run out in my little EP3 JDM Type R race car. I was wondering if any of you could help point me in which direction to look with regards to trying to troubleshoot this issue.

Basically, the car pulls brilliantly while it is getting upto temperature, however after a lap or so at speed the car starts to slowly pull the power, first in the corners only, then all over the circuit. The car acts as if the throttle is slowly being reduced, even though it isn't. Eventually the problem gets so bad that the car idles but when you're sat in the pits and you stab the throttle, the car bogs down and stutters but the revs dont rise.

I checked my K-Pro and the tps is working fine and there are no error codes showing.

In addition to this (although maybe unrelated) the fan doesn't turn on and the car overheats when standing (we bypassed this by wiring it into the lighting so the fans work when the lights are on :D )...we also checked the thermostat and it is operating normally.

Any help to identify the fault appreciated.