My 99 ford expedition shuts off and i'll have to wait for 3 nto four hours before it starts again. it acts like its not getting any gas when ii try dtarting it before the time pass

Your altinator is not charging you battery

i have the exact problem.im trying spark plugs

all fords come with a fuel reset button. it also sounds like a bad fuel pressure regulator

Other than diagnosing a solenoid issue,your left
with rebuilding the trans

They don't last more than ten years in most cases,
because the fluid isn't changed every 3 years or not
more than 30,000 miles

A transaxle which is in most cars worldwide don't see
80,000 & if they do there beyond help

There key is Slipping,recognized or not
Drive 10 miles & your done,clutches overheat
as well as seals harden etc

Just a guess here, but check your ignition coil. Make sure it's mounted nice and tight to the block. a bad ground on a coil will mess with you bad. other than that, I'd check and replace your fuel filter.

Depend on mileage on them. Personally I don't run plugs more than about 50-60K regardless of what the owner's manual says.

Pull plug three and see what it looks like: fouled (dark oily residue, bent electrode, etc. If electrodes seem worn from use and mileage, replace plug--you'll see scooped out area on outer electrode if excessively worn, clear code and see it it runs ok. If it codes again it could be a bad plug lead as well. If code returns then check out lead to plug or replace it. Plug 3 will be on the left bank of the engine third one from the front. Plug order is:

Back

4 8
3 7
2 6
1 5

Front

Firing order 1-3-7-2-6-5-4-8

Try this next time you start it. Turn the key to the run position, do not start the engine. Wait 3-5 seconds and turn the key off. Turn the key right back to the on position and wait for 3-5 seconds. Turn the key off. Repeat the above one more time. Now try to start. If it starts right up you have a fuel supply problem. Either the fuel pump is bleeding off or the fuel pressure regulator is leaking. Pumping the pedal is doing nothing besides buying time for the fuel system to pressurize. Post an engine size and I'll help you locate the fuel pressure regulator. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

could be fuel pressure regulator or throttle position sensor,check them first,make sure your getting fuel to motor

no motors
have the fault codes read as it could be an EVAP system problem

fuel pump may be going. try this. turn key on, listen for fuel pump to run for 5 seconds. Turn key off, wait 15 seconds or until you hear relay click inside car. Turn key on again for 5 seconds and ff for 15 seconds. repeat once more. This will pressurize fuel system to 40 psi so injectors have full pressure. If it starts quickly now, you are getting bleed down through the check valve in the fuel pump or the fuel pressure regulator on the fuel rail.