I have an 88, S15, 4.3, Auto, 4x4, with 197,000 miles that's driving me crazy (crazier??)......It runs fine when cold. When it reaches operating temp and it's driven at around 40 to 50 mph, it feels like it's cutting out electrically. It happens for a second and then will be ok for another minute or so, then it does it again.
It's not setting any codes. I've used WinALDL and see all the sensors responding as they should. Timing has been checked and it's fine. ESC is working because when I disconnect it I see the timing change........It has new injectors (Standard), plugs, wires, rotor, cap. My mechanic also changed the pickup in the distributor - since that was original. Also changed some vac lines that were dry-rotted.....All this, yet I'm still experiencing the problem. I'm stumped - and so is my mechanic.
I'd appreciate any help you can provide.