When my truck starts in the morning the idle is rough. when I drive it and get to a stop light I press the brakes and it has a vibration in the motor.
Maybe a miss fire going on...can also b motor/tranny mount go in bad...in my car I notice if I put it in neutral at a light the vibration goes away when its a mount...
SOURCE: Truck losing power and service engine soon light on
Like to other guy said, give it a tuneup. Also try SEAFOAM to clean carb up of slug. Also check to make sure the butter fly for the choke has not come loose, causing it the choke it down. Failed choke pull-off.
SOURCE: at stop rough idle
idle air speed controller.
dirty throttle body
air cleaner clogged
air flow meter
bad injector
leaking intake manifold
vacuum leak
bad plugs
ignition components
SOURCE: 2000 Lincoln Navigator with rough idling and service engine light
i had the same trouble, there is a rubber boot under the cover on the top of the motor, it is coming from the egr valve, takes about 5 mins to repair and less than 5 dollars.
SOURCE: Rough idle
I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.
SOURCE: 2004 Chevy Trailblazer idles rough.
If it has not pulled any codes (idiot light). Clean your throttle body, and change your spark plugs with A/C Delcos #41-103, most other brands will cause rough idle like Autolites and Bosch. This would be a cheap way to fix this problem.
If by chance you have just recently changed the battery or had the battery unhooked. Let me know, it's an easier fix that costs virtually nothing.
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