You're not gonna like this, but you asked. I think the next place to
look is in the carb float bowl. I've seen some of these with dirt and
rust in the bottom of the bowl that causes the float to run high and
sends too much gas to the engine.
Good Luck ! bob

pete@nospam.com wrote:
>
> I have a 1989 Honda Accord DX (carbureted) with a manual transmission.
> The car just started to idle rough, otherwise the idle was always very
> smooth. I tried new plugs, wires, cap, rotor, fuel filter and air
> filter without any change. I tried spraying carb cleaner to find a
> vacuum leak, but the idle didn’t change. I applied vacuum to the EGR
> valve and the engine stalled, so it looked like it is working. I know
> that Hondas have problems with their distributers, is a rough idle a
> symptom of the distributer about to go ? It’s possible that I got a
> tank of bad gasoline, but I do not really think so. If anybody had a
> similar problem I would appreciate any help. The car seems fine at
> highway speeds. Also, would a bad oxygen sensor cause a rough idle ?
> Thanks for any help …

 

Do You Have the Blurry "H" syndrome? When the car is in Gear, assuming it
is an automatic, does the H in the center of the steering wheel appear
blurry due to the idle roughness?? If so, have the motor mounts checked,
they are usually the culprit





"N.E.Ohio Bob" <rgstroud@neo.rr.com> wrote in message
news:3F0ABDEE.DFD9A1F7@neo.rr.com...
> You're not gonna like this, but you asked. I think the next place to
> look is in the carb float bowl. I've seen some of these with dirt and
> rust in the bottom of the bowl that causes the float to run high and
> sends too much gas to the engine.
> Good Luck ! bob
>
> pete@nospam.com wrote:
> >
> > I have a 1989 Honda Accord DX (carbureted) with a manual transmission.
> > The car just started to idle rough, otherwise the idle was always very
> > smooth. I tried new plugs, wires, cap, rotor, fuel filter and air
> > filter without any change. I tried spraying carb cleaner to find a
> > vacuum leak, but the idle didn't change. I applied vacuum to the EGR
> > valve and the engine stalled, so it looked like it is working. I know
> > that Hondas have problems with their distributers, is a rough idle a
> > symptom of the distributer about to go ? It's possible that I got a
> > tank of bad gasoline, but I do not really think so. If anybody had a
> > similar problem I would appreciate any help. The car seems fine at
> > highway speeds. Also, would a bad oxygen sensor cause a rough idle ?
> > Thanks for any help .

 

In article <3F0ABDEE.DFD9A1F7@neo.rr.com>, rgstroud@neo.rr.com wrote:

> You're not gonna like this, but you asked. I think the next place to
> look is in the carb float bowl. I've seen some of these with dirt and
> rust in the bottom of the bowl that causes the float to run high and
> sends too much gas to the engine.
> Good Luck ! bob


If the float was too high because of crud in the carb bowl, it would SHUT
OFF the fuel! That would take a lot of crud!

Check the PCV valve.