Got a question maybe someone can answer...

My 88 Honda Accord Lxi with 200K plus milage started rev'ing up and down
after warming up. I thought maybe the vacuum adv. on the distributor
might be bad, but verifing timing (pulling hoses and blocking/ chk
timing) all are alright (car does not rev up and dwn when I do this).
But once I put the hoses back same thing. If I pull the hose closest to
the front end of the car, the engine stops rev'ing up and dwn. Another
thing I did is replacing the all hoses to vacuum adv, I disconnected the
power plug to the vacuum control module (left portion of firewall) and the
car stops rev'ing up and down. SUGGESTIONS????