the I4 or V6 engine not told. 2.3L or 3.0L-v6
ask ford that, merc,ford, call them.
not told at all what computer means.?
PCM?
cars are full of them and worse every newer year.
yes all that is married.!
key security IMMO if there.
PCM ,BCM and cluster
the PCM (that has tcm inside) must be proprogrammed for lots of things, Odometer, VIN, , security and engine type and what transmission is there, for 2 or 3 types.\
and key options on the car, like Radio. there. of 6
i bet the computer is not bad, PCM
inputs to a computer must be good or outputs will be wrong! (rule of GIGO garbage in ,garbage out)
all inputs and output actuators must be good!! ALL!
cam jumped time is an easy fix if head valves not bent/
never checked all fuses and scan the PCM for errors?
so engine died but the starter cranks fast or what?
V6 is chain cam the chain wrecked?
and is interference engine, got this? DOHC 4 cams.
means never let the chain fail.
I4 is chain cam. and has hydra,chain tension'er that must not be bad. or chain goes wild. cheap fix that.\
free running engine, no bent valves deals.
spark timing is fixed in the PCM. not adjustable ever.
find a real ASE shop and end guessing.
they do the tests and deep inspections to learn truth,.
i get my PCM from CARDONE
and it says clear as day
flash programing.
and did not lie
https://www.cardone.com/search.php?search_query=%22XJ9Q8A9~%22&year=2005&make=MERCURY&model=MARINER&Part%20Type=Engine%20Control%20Module&sort=alphaasc
9x out of 10 scans the PCM as you crank any dead engine and it tells you why it did.
sure P0-3xx errors for cam/crank, cmp/ckp sensor out of sync when the chain fails
but gee the chain warned you in advance (I WILL FAIL HARD SOOn with huge racket of noise top of engine)
good luck !!!!!