I would suggest a new set of plug wires.
Taking your foot off the accelerator.
Probably wheel bearings or wheels are unbalanced
It is idling. This is hard for an engine to do smoothly.
sounds like iac or air in the cooling system
There are several things that can cause your Jeep to stall while idling. The timing may be off or your fuel filter may be clogged.
Your Dodge Durango may stall when idling at a stop light for a couple of reason. One reason may be that a part needs to be replaced on the car.
This could be a few things, especially if the vehicle is idling too low. Check your PVC hose, particularly the elbows for wear and tear or any holes or collapsing. You can repair these temporarily by wiping them off well to remove dirt and wrapping in electrical tape until you are able to get the part replaced.
If the car dies while idling, the timing might be off. Other causes can include a clogged fuel filter or a bad spark plug.
Could be several reasons but a vacuum leak would be most likely.
There could be many reasons, a vacuum leak is one possibility.
The belts are becoming worn and need to be replaced, or the fanbelt tensionning device needs adjustment. The only other thing it could be is that one of the things that the belts are driving is becoming seized (AC pump, power steering pump etc); but if everything else is OK then it is most probably the belts being worn out.
Your engine probably has a vacuum leak
It sounds like you have air in your fuel system.
One of your belts may be loose or in need of belt dressing.
A worn or loose out of adjustment drive belt could be the cause.
twice Toyota replaced the idling valve assembly in my 2001 sienna van, under the 36,000 mi warranty, since then I've had it replaced another 2 times. the mechanics say it's a defect in camryand sienna vans. so my last mechanic advised me to use better brand gas like chevron, which i guess helps coz i used to put any type from arco, vons, Costco, generic types. when the idling assy is replaced, it starts and idles fine, assy alone costs about $220-260+
You should check the timing and plugs.
I have the same problem. I believe the idle air control valve either needs to be cleaned or replaced.
my idling on my 2001 ford focus is not idling correct, tried to adjust idling but there is no screw or way to adjust why?
Usually, it is your fan belt slipping due to moister. You can get a spray for it at your local auto store.
it maybe just a timing problem
probably the governor going bad
The spark plug gap can cause the RPMs to fluctuate, while idling. The more probable cause of the fluctuating RPMs is a bad camshaft.