l buy Lincoln Navigator of the 2000 4WD. the motor it is broken and replaces it by one of the 2001. 2 months later theLincoln is coming(comenzo)to give to a tug the revolutions and the miles went away to zero and began to blink the light bulb of theft and the Lincoln its off(se apaga). This single failure happens when the accelerator is full or complete and foward only in reverse no have problem.

Disengage the parking brake.

who are you?

check the dealer for bulletin on your car ,there is one that l remembered about the dash acting the same way as yours
and l have to replace the instrument panel,

of course they have to check for trouble code first

visually inspect your wiring harness on the engine there might be a loose wire some place