These are great possibilities. I'll check it tomorrow and let you guys
know. Please let me know more if there are other possibilities. Thanks
all.

"jim beam" <uce@ftc.gov> wrote in message
news:HVsuc.76572$q04.19017@newssvr25.news.prodigy. com...
> check the tandem valve is operating properly. if you take off the top
> off the throttle body, you can see it operating like a choke - it should
> open when you open the throttle.
>
> there's a piece of vacuum hose that runs from the tandem control valve
> [at the bottom of the throttle body] to the tandem diaphragm. if this
> is cracked & leaking, you'll have exactly the problems you describe
> because the tandem is not opening fast enough and the valve is choking
> off air supply to the engine during acceleration.
>
> Thien-Anh wrote:
> > Honda Civic DX 1990
> > I changed an used distributor about two years ago. I have a one-month
new
> > clutch and all my valves are adjusted. My water pump and timing belt
are
> > about two years. My car ran smoothly for the first week after adjusting
the
> > valves, but the same old problem occur after that. The problem is that
when
> > I press on the gas pedal unexpectedly, it does not accelerate
immediatelly.
> > Some times it does not even accelerate. The engine is reving, but no
> > acceleration. I took to so many mechanic, but no one knows what causes
it.
> > Any one has similar problem, please share. Thank you.
> >
> >
> >
>