Q: Engine clicking and shaking

asked by on January 19, 2017

A few weeks ago I added oil(the correct kind) and the truck began to have a ticking sound from under the truck an when I'm slowly accelerating at 35mph to 45mph there is a shudder from the entire truck. Also when I hit 70mph the truck runs terribly. I thought it was the U-Joint so I replaced those but not the cause. I individually pulled the spark plug wires off the distributor as the truck was idling and the tick was constant. The truck has plenty of transmission fluid(right color right smell) and is shifting properly. It is however running rich and it does not have the usual deep rumble when accelerating.

My car has 168000 miles.
My car has an automatic transmission.

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