What caused the engine swing of Lincoln Navigator's 5.4-displacement gasoline car?

In this case, you need to judge whether it is idle jitter or accelerated jitter first.

Generally speaking, the first thing to do when idling is to distinguish whether the idling speed is too low or the cylinder is missing.

If the idle speed is too low, you can clean the idle valve and throttle.

Then if it doesn't work, check the data flow with the computer to see if there is any problem with the air intake.

If the cylinder is missing, the fuel injection system, ignition system, cylinder pressure and timing need to be overhauled!

If it is acceleration jitter, it is generally caused by poor engine combustion. If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.