I have a 2000 Lincolns ls with a v-6.A month or so back we took at on a road trip and went shopping ,came back out and at first crank it didnt start but after that it fired right up.Well as of today we went to the doctors and when we came back out we had to crank it like 8 different times for it to start.Then when we got to tractor supplies it took maybe cranking it 12 different times.drove it home and when we pulled in the drive it stalled and after a couple cranks started right up.could this be a fuel pump?Thanks Heather

Battery and connection good.

This problem can be from the Inertia sensor. On Lincolns, the Inertia switch is usually close to the Air-ride cut-off switch in the trunk. Or behind a front floor kick panel.

There is a reset button on the switch. Check photos on the Web if you want to see what you are looking for.

Not much of a repair shop

Use the codes & reference material to diagnose
the problem

No reason a repair shop can't do that

Leave it there until they drive it & the light comes on

They have a scan tool & have to use it on a road trip
& record the data

Sorry , but your best bet ,take it to a qualified repair shop.

Are the spark plugs wet with fuel ? are they black ( fouled ) ? You don't have the money to take it to a shop ? But do you have money to replace a bunch of parts that don't fix the problem ? I could tell you a number of thing's that could be wrong , but without testing that would be guessing . Mass air flow sensor , ignition control module , crankshaft position sensor , How's the battery voltage ? Low voltage can cause problems , You said thought starter went . slow cranking ? Battery cable's , connections etc.... Does your brother know how to use a volt meter ? Voltage drop the starter circuit . Starter Voltage Drop
How to voltage drop test starter motor circuit

Its probably your computer. Had the same thing happen to me about ten years back. About 500 dollars. better off finding one on ebay or at a junk yard.

pumping the gas pedal does nothing but open a butterfly to give air to the engine, possible that the pump you got is bad or the fuel pressure regulator is bad , its part of the assembly

Have the battery terminals checked - sound like a loose battery terminal. As u go over a bump it can cut out the engine then u dont have a good enough contact to run the starter. Get someone to try to crank as you wiggle the battery leads if it cuts the lights on the dash intermittently theres your prolem. Also check the ground wires to the motor.
Hope u get sorted

try unhooking battery and letting set foe a few minutes then hook back up

you know. i took it to a mechanic and actually.... The timing belt cut the Crank Shaft Censor... So it was the crank shaft censor again. The wires were routed wrong from the first mechanic that "fixed" the car.