I have a 2008 Ford Ranger with 3.0L automatic with 51,000 miles on it. The engine vibrates when its idling in park. Its done this since I bought it 3 years ago when it only had 24,000 miles on it. I've changed plugs, wires, coil pack, and air filter with NGK and Wix products. Also no check engine light on. Thanks.
Check ALL your engine & transmission mounts. They’re probably worn out if they’re still the original ones..
I would check all the vacuum lines for cracks or disconnects.
That was kinda what I was leaning toward since there's no engine light on
is it vibrating on idle due to poor running or is the whole engine shaking/ moving while idling?
It really don't seem to be running rough, there's not what I would say a misfire more just shaking.
Well try dumping a can of sea foam in the gas tank and Marvel Mystery oil in the crankcase. Run the truck and see what happens then. For a 2008 51,000 miles is pretty low mileage. Have someone turn your truck on while you have the hood open and seeing the engine. If it jerks or moves on start up you may have bad motor mounts.
I'm gonna mess with it when the weather gets a little warmer from the suggestions I been getting id say its one of the mounts cause I've had the hood open when I started and it does do a lot of shaking when you start it up.