Put a new head gasket in my 88 2.3L 4x4 (it was blown out between #2/3). Everything else was in good working order- fuel, ignition,charging, etc. systems. It started right up, holds a good smooth idle but will not accelerate when the gas pedal is pushed. It sounds like it speeds up a little and tries to advance but won't take off more than 500 rpm. Any advice on I what I might have screwed up would be greatly appreciated. Thank you, Mike.