Vibration at idle
My 2002 Accord 2.3 VTEC A/T has an unpleasant vibration at idle with the car in gear and my foot on the brake. The vibration comes right through the steering wheel and is worse when the a/c compressor cycles on. Also, turning on the lights and putting a load on the alt makes the vibration worse. I have replaced the lower front motor mount directly behind the radiator. If I gently rest my foot on the gas pedal and raise the RPM's to just under 1000 things smooth out. My idle seems to hover around 750 rpm. What is the correct idle speed and can it be adjusted? Any other ideas as to how to eliminate this vibration?
it could be a worn out motor mount.
I have the same problem, please help
When was the last time you did a tune up? Sounds like you may have a misfire. You can spray the spark plug wires with water and observe them. You may see sparks jumping from the wire to any ground. I would start there. It could also be an injector but i havent seen too many go bad on hondas.
I have replaced the timing belt, plugs, motor mounts, but not the wires
check the wires. Im not sure whether it has a distributor cap and rotor or coil pack. if its cap and rotor replace them too. If its coil pack pull the wires off and check for corrosion. If there is corrosion build up on the terminals replace as well. Good luck
If your car has new motor mounts and idles smooth without a/c you do not need a tuneup . It has to do with the load of the a/c on a weak 4 cylinder engine . Sould have had a v6.
I have the same problem with a 2009 Accord with 32000 miles. It rode smooth for the first 3 or 4 months then the vibration started. So it is not the weak 4 cylinder engine. Dealership cannot figure it out. Honda America has definitely heard of the problem but until enough people complain they will not put out a bulletin. So I'll be complaining.
It is that top engine mount close to the power steering fluid bottle.
2002 accord i4 same issue - just spent $300 on a tuneup that did smooth out the Park Idle, but idle in Drive with foot on brake - car still shakes. Mounts are just fine. Distributor cap & rotor replaced & injectors / throttle body all cleaned thoroughly. Open to suggestions....
Not sure about the 2002, but the 2003-2007 4- cylinder Accords have this problem. Some service writers at Honda know about it and others don't. These cars have vacuum-operated motor- mounts that are supposed to harden or soften based on ECM input. They made a kit to fix it which included motor- mount upgrades, dampers for the radiator mounts and something about the front bumper mount. I was going to do this, but after a lot of Internet searching, I found few people who ended up with a completely good result so I decided to live with it. The idle is set by the ECM and can't be adjusted. It's a design flaw that causes this issue. You'd think they could have solved it over the 5 years that model was built. One mechanic told me that Honda OEM mounts will mitigate it somewhat, compared with aftermarkets.
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