G3 Accord intermittent rough or low idle
Maybe I should say intermittent normal idle. When my '88 Accord DX
(carbureted, automatic) warms up, the idle is often rough at a stop in gear and at idle. It is bad enough that the hood shakes and the steering wheel wiggles. If the idle isn't too low, it usually still vibrates enough to make the steering wheel wiggle rather obviously. In an attempt to fix this issue, I replaced the idle boost diaphragm that boosts the idle for the A/C and for the auto in gear. I changed the transmission fluid very recently and that had no effect. With the gas pedal, I can mostly get rid of the shake by raising the RPM to what appears to be a little over 800 RPM on the built-in tach. Even so, if it has a bad case of the shakes, you can still see and feel significant vibration in the steering wheel at this RPM but it is tolerable. Sometimes, on the same day it will be pretty smooth. Any ideas? Aron |
Re: G3 Accord intermittent rough or low idle
In article <po0Ac.12867$Y3.11289@newsread2.news.atl.earthlink .net>, "Aron"
<drenkav1912@earthlink.net> wrote: > Maybe I should say intermittent normal idle. When my '88 Accord DX > (carbureted, automatic) warms up, the idle is often rough at a stop in gear > and at idle. It is bad enough that the hood shakes and the steering wheel > wiggles. If the idle isn't too low, it usually still vibrates enough to > make the steering wheel wiggle rather obviously. > > In an attempt to fix this issue, I replaced the idle boost diaphragm that > boosts the idle for the A/C and for the auto in gear. I changed the > transmission fluid very recently and that had no effect. With the gas > pedal, I can mostly get rid of the shake by raising the RPM to what appears > to be a little over 800 RPM on the built-in tach. Even so, if it has a bad > case of the shakes, you can still see and feel significant vibration in the > steering wheel at this RPM but it is tolerable. Sometimes, on the same day > it will be pretty smooth. Any ideas? > > Aron Try adjusting the timing. I believe your vehicle has a carbuator. If so, you might try adjusting the carbuator. I seem to recall that there is one main screw that you can turn left or right that helps to adjust the idle. If you know the location of that screw, adjust it while the engine is running. Also--check all of the vacuum hoses to make sure they are connected and don't have any holes. Also, adjust the points. -- NEWSGROUP SUBSCRIPERS MOTTO We respect those subscribers that ask for advice or provide advice. We do NOT respect the subscribers that enjoy criticizing people. |
Re: G3 Accord intermittent rough or low idle
It is carbureted but it has no points. It has some kind of igniter system
that uses vanes and an inductive pickup, or something to that respect. I have checked the vacuum hoses and the timing in past months trying to get to the bottom of this problem and have not found the answer. As far as adjusting the idle, there are a few screws for that along with one for the mixture. Sometimes it is idling rough when the RPM is appropriate according to the tach. That's what makes me hesitate to adjust the idle to fix the problem - it seems like the problem will still happen. The second thing that makes me hesitate to adjust the idle is that the procedure is "idle speed/mixture adjustment". I don't know if it's OK to do one without the other because the steps have you do both. I don't want to mess up the mixture. Also, to adjust the mixture, you have to unbolt the carburetor to get the cover off the mixture screw. This will mean replacing the gasket and maybe a number of old vacuum hoses. I don't want to deal with all that unless I am sure it's going to fix the problem. I'm happy to hear any suggestions from anybody though. "Jason" <Jason@nospam.com> wrote in message news:Jason-1606042119070001@pm4-broad-21.snlo.dialup.fix.net... > In article <po0Ac.12867$Y3.11289@newsread2.news.atl.earthlink .net>, "Aron" > <drenkav1912@earthlink.net> wrote: > > > Maybe I should say intermittent normal idle. When my '88 Accord DX > > (carbureted, automatic) warms up, the idle is often rough at a stop in gear > > and at idle. It is bad enough that the hood shakes and the steering wheel > > wiggles. If the idle isn't too low, it usually still vibrates enough to > > make the steering wheel wiggle rather obviously. > > > > In an attempt to fix this issue, I replaced the idle boost diaphragm that > > boosts the idle for the A/C and for the auto in gear. I changed the > > transmission fluid very recently and that had no effect. With the gas > > pedal, I can mostly get rid of the shake by raising the RPM to what appears > > to be a little over 800 RPM on the built-in tach. Even so, if it has a bad > > case of the shakes, you can still see and feel significant vibration in the > > steering wheel at this RPM but it is tolerable. Sometimes, on the same day > > it will be pretty smooth. Any ideas? > > > > Aron > > Try adjusting the timing. I believe your vehicle has a carbuator. If so, > you might try adjusting the carbuator. I seem to recall that there is one > main screw that you can turn left or right that helps to adjust the idle. > If you know the location of that screw, adjust it while the engine is > running. Also--check all of the vacuum hoses to make sure they are > connected and don't have any holes. Also, adjust the points. > > -- > NEWSGROUP SUBSCRIPERS MOTTO > We respect those subscribers that ask for advice or provide advice. > We do NOT respect the subscribers that enjoy criticizing people. > > > |
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