1992 Es300 Bogs Down Upon Acceleration

[djsgrisham]

I have a 1992 es300 with 129,000 mi. One day when i was pulling out of a convenience store, it just lost all power when it shifted from 1st into 2nd although still accelerated slowly. Then a couple seconds later, still slowly accelerating, it "caught" and accelerated at normal speed. Now it sometimes does it at highway speeds bogging, then accelerating. Pushing down harder on the gas pedal has no effect. It accelerates when it wants to. IS TIMING AN ISSUE HERE? ELECTRONIC?

[Toysrme]

check:

vacuum leaks

ignition timing

plugs, NGK or Denso only.