A couple of weeks ago I hit a pot hole that was covered in water and couldn't tell it was there until to late and my Lincoln Navigator 98' started shaking badly right after I hit the pot hole. Now every time I start the suv it shakes a lot. And when I press the gas to go it shakes even worse. And now the Engine light came on and keeps blinking. I was told it may just need a tune up. But it shakes way to much, and I no nothing about cars, what can be the problem? Please help!

Question edited for clarity.
Question moved to Lincoln Navigator.

Any DTC Codes?
Did you disconnect the battery lately?
Is the Security Light flashing?
Do you have fuel pressure?
Check for spark?

The most common causes that hinders normal starting operation of your Lincoln Navigator are dead key fob battery, dead 12v battery, corrosion on battery terminals, bad alternator, clogged fuel filter, broken starter, blown fuse, empty gas tank, immobilizer error or any fault in the electrical system.Dec 17, 2020

Lincoln Navigator won't start - causes and how to fix it

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It is a near useless add-on to the ABS Braking System

It cuts off fuel injectors & thus engine power when you need
control over it,mostly slipping in snow

It on my Lincoln slams on the rear brake & you stuck in snow

If I ever found a way to cut the wires & shut it off I would make
it public knowledge

I have the wiring diagrams & have not yet worked too much on it

On my car Off is On & the owners manual couldn't be figured out
if you had a Doctorate Degree

If the Light is Off it is the system is on,go with that

Have battery tested , my truck did the same last week & it left me sitting . My battery was bad . Any auto zone or advance will check it for free

Try this from my previous post....

Have a similar problem... My 2003 Lincoln Navigator was manufactured May 22, 2003 so it's the late model that came with the Intec 5.4 Liter DOHC V-8 (not the Triton engine).

I replaced the two front ride height sensors (one for each air strut) and replaced the one rear ride height sensor that controls the ride height for BOTH rear air struts. (Yours may have one ride height sensor for each of the rear air struts.) That solved the problem for a few months during the warm months, until the weather started cooling off. Then back to the same issue.

The front passenger air strut started releasing air from the solenoid (air block) making a "hissing sound." Replaced BOTH front air strut solenoids (connected at the top of each air strut). That also resolved the problem for a few days. After going all around the world, I discovered it's the Air Ride Control Module (ASM) that was the problem all along.

typical dealers response
indicates that there is a faulty non-return valve in the system that is passing air when sitting and allow air in and out when compressing
I would start by checking the valves at the discharge line at the compressor, working to the air reservoir valves then onto ride height control valves finishing with holes in the air suspension bags them selves
yes it work doing the checking but there is no real expense until you find the faulty part and I am sure that it will be less than the quote

Check fuses for the air pump. I think that has air ride and the pump is probably not working to air up the rear shocks. If you have the owners manual, look in the back for "Fuses" and go to that page. That will tell you where the fuses are and what they are for. Good Luck.

It sounds like you have a front end problem as well when you hit the hole.

It sounds like you just need to have a wheel balance done on all 4 wheels.Maybe just try balancing the front first.

I would guess it is a brake pad that is a little slow releasing sometimes.

This is what your idle control valve looks like, it will be located on your intake manifold. You will have to remove the black plastic cover that is over the intake to see it. Hope this helps......