Tachometer swan dives; 88 Volvo 740 Turbo

After I press in the clutch and let off the gas, as in when I approach
a stop sign or shift, my tach will plummet to the first notch above
zero (less than 500 rpms) and then climb back to 1000 and idle
steadily. If this gets worse I will be stalling out, obviously. What
is going on and what can I do to repair it?

James Moening
jazzkind(at)fast.net

Clean the throttle body and check the adjustment of the throttle plate.

"JungleAcid" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> After I press in the clutch and let off the gas, as in when I approach
> a stop sign or shift, my tach will plummet to the first notch above
> zero (less than 500 rpms) and then climb back to 1000 and idle
> steadily. If this gets worse I will be stalling out, obviously. What
> is going on and what can I do to repair it?
>
> James Moening
> jazzkind(at)fast.net

Is this the same on every car? My friends Mazda (1993 MX-3 Mystere) does the
exact same thing, he hasn't had any driving related problems from it tho.
"James Sweet" <(E-Mail Removed)> wrote in message
news:59_0b.213654$YN5.147982@sccrnsc01...
> Clean the throttle body and check the adjustment of the throttle plate.
>
> "JungleAcid" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) om...
> > After I press in the clutch and let off the gas, as in when I approach
> > a stop sign or shift, my tach will plummet to the first notch above
> > zero (less than 500 rpms) and then climb back to 1000 and idle
> > steadily. If this gets worse I will be stalling out, obviously. What
> > is going on and what can I do to repair it?
> >
> > James Moening
> > jazzkind(at)fast.net
>
>