"Tegger®" <teggeratistopdotcom@changetheobvious.invalid> wrote in message
news:Xns942FC0414D82Eteggeratistop@66.11.168.195.. .
> "Cory Dunkle" <cadnews@verizon.net>, being of unsound mind, did utter in
> news:K8Srb.20263$y95.10052@nwrdny01.gnilink.net:
>
> > I have an '86 Prelude with the 1.8 dual carb engine. When I release
> > the gas pedal to shift the RPMs will usually rise a bit and then
> > slowly come down, sometimes the RPM just stays where it is for a
> > second then drops. Why might this be happening
>
>
> Vacuum-operated emission control dashpot that holds the throttle open
> briefly when you let up off the gas to shift. Common with carbs after
about
> 1973.

Blech. I'm used to my '60s Fords which pretty much everything is manual or a
very straightforward linkage/design/adjustment. Also, the only emissions
controls are PCV valves, which help keep the engine clean.

> > and what can I do to
> > fix it?
>
>
> Disconnect the damn thing. A real PITA they are.
>
> Look for a round, diaphragm-looking thing with a vacuuum hose going to it
> and with a bracket and screw impinging upon the throttle linkage. Be aware
> that if you have to go for emissions tests once in a while, you'll need to
> reconnect it before being tested. Also understand that if you have state
> enviro-Nazis patrolling your roads, they take a very dim view of
> disconnected smog shit. You can also just back off the adjusting screw
> until it does not touch the bracket and thus does not hold the throttle
> open. This method is not obvious to the eye and will be easier to get away
> with.

It's very tight in the area around the carbs (everywhere really) but I will
look for such a thing and disconnect it. I would much prefer the car to
behave like a normal engine. If I wanted the RPM to stay up after I let off
the gas I wouldn't have let off the gas, now would I? Well hopefully I can
fix that.