I'm not a frequent user of this forum, but some of you may remember I have a S2000 engine in a 1960 MGA. I use the standard ECU, and today on a Club run, the car went into limp home mode 4 times. Each time, I would stop, turn the ignition off, wait a minute or so, then re-start the car, and it ran perfectly for another 20 minutes or so, then the problem resurfaces. I have noticed a little "pinking" in the motor, so would this be a knock sensor problem, and the computer puts the car into limp home? I can't understand why on re=start, the car is normal again?

Any info helpful, as I am from the SU carb brigade!

Cheers
Gary.