Just started having a very similar problem. Started the car the other day and had no throttle response in either D or R. Restarted the car and all was fine. Sitting in traffic, throttle wouldn't boost off, but raised very, very slowly. Again, a quick restart seemed to cure.
I have contact cleaner and have had several corrosion issues in the car already, I've given a few plugs a spray, which ones exactly relate to what I need to look for?
Thanks all.
The round one under the manifold connecting the injection pump to the harness.