Vibrations While Idle and smoke issue!

Define the issue a bit Further. does check engine light flash while stopped? check the basics is there air restriction and when where plugs last changed?

I'm not sure exactly which vehicle you have so I'll try to be genera yet as specific as possible to help you determine the problem. I'm assuming here its a Gas Fuel engine.

1.) if its a carburetor type engine, You may need to adjust the RPM to increase or lower the Idle. Its commonly called the Ideal screw and adjust the air fuel ratio to stabilize the engine fuel mixture to increase the RPM.. its found on the Carburetor.

2.) ts fuel injected you will need to adjust the throttle body position to archive the same effect.

if it has a distributor , you can turn the distributor as well to adjust the RPM.


rough idling is usually caused by Mounts, since you changed yours the next most likely issue is the RPM itself or idling speed / rpm. If its to low you ill have that issue.

other possible cause is the distributor points (if any).. bad plugs, bad plug wires.. but those cause other issues while driving as well.

sound like a coil packed up on one of the cylinders or a sparkplug or a sparkplug lead if there is no coil packs.the vibration will be there when is idling because of misfiring.hope this helps

if what your feeling is not an engine miss,
then it will be a motor mount,best chances are the front center one,,
or top trans mount

check the motor motor mounts for movement,
watch how far engine rocks forward or back with it running and foot on brake

check serpentine belt tenssioner

Fairly often, simple replacement of your airfilter and sparkplugs can significantly reduce vibration. Othertimes, its more of an electrical issue involving the computer system.

mcdevito75 here, A vibration while idleing is not really normal, a rough idle could be many things, wrong octane gas, dirty gas filter, dirty smog controls. Have your local shop take a look for you.

If your engine is not misfiring but it vibrates too much while idling your motor mounts might be getting worn out. I had a Nissan with bad motor mounts. I was ok in park but when you put it in gear it vibrated a lot. It smoothed right out as soon as you started moving.

check out harmonic balancer .