Had this problem on a 1992 Honda Accord. The idle air screw on the
throttle body had loosened causing the engine to rev up. The computer
would then try to bring the idle down, the net result was a flucuation
in idle between 1,000 and 1,500 rpm. So you might want to check the
screw (was on left side of throttle body opening on the '92), I think
the normal idle speed should be around 750rpm. I just turned the
screw clockwise until I reached that rpm and the revving stopped.

Good luck.

CPT BOYZ <jcisall@yahooo.com> wrote in message news:<Xns9444E01185840JCCOCOM@66.75.162.196>...
> 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????