Scotty, I have a problem I can't explain. Randomly, not always, just randomly, mainly on the highway, the car will suddenly lose power for half a second or so and then jump back to life. Plugged in a…

Trip02

Scotty, I have a problem I can't explain. Randomly, not always, just randomly, mainly on the highway, the car will suddenly lose power for half a second or so and then jump back to life. Plugged in a scan tool, checked fuel trim, it's perfect, LT 0.00 ST bounces as normal +- 3%. TPS is ok if I keep it at 20% when it borgs TPS value doesn't change. Cars pretty perfect, no fault codes, only known problem is the thermostat, runs a bit cold. Other than that, can't seem to pinpoint the issue?

What could it be?

Car a VW 1.4i