Hi ?,

It looks like more than one issue going on to me.
I didn't see that you checked for OBD codes.

You can sort out the No Crank problem by using the service port connector in
the engine bay to see if that cranks the engine normally.
Put +12V from the Battery to that port with a jumper wire.
If it then cranks OK you can suspect the ignition or interlock switch.
Both switches need to carry enough current to pull in the starter solenoid.

Alternatively just short the starter solenoid with a big screwdriver and see if
it cranks OK. Then go back to find the wiring culprit.

Do this before swapping the starter.

Confirm that you pulled apart and cleaned all of the piggybacked wires at the battery positive terminal, then used Penetrox or conductive grease.

Get it cranking normally and then go back to the other problem.

You're lucky to have a donor parts car there. Swapping fuel relays might not solve the problem if there's loose or corroded relay socket pins.
Make a gauge with a hunk of copper wire and a 1/4" male spade lug to verify
connector pins are tight. Use Penetrox on the pins.

Check your CPS, AMM, & power stage connector carefully for damaged pins, Use Penetrox. Your power stage is ready for re-seating with fresh thermal compound.

You might want to swap ECU's, Be sure to disconnect the battery
for several minutes before pulling the ECU connector!

Study Ron Kwas's website with his fine write-ups explaining how poor connections can rain on your parade: Note the article about the lowly 1/4" spade terminal. That's what's used for the fuel relay.
Find the article about ACZP at Ron's site:
http://www.sw-em.com/techarticles.htm

Just some of the outstanding articles at Ron's site.

http://www.sw-em.com/Wiring%20Notes.htm#the_lowly_250_push_on_terminal

http://www.sw-em.com/Deoxit_D5_Additional.htm#my_recommendations

http://www.sw-em.com/voltage_drop_in_headlights_power_in_hex_connector.htm

http://www.sw-em.com/Realworld%20Experiences%20with%20Electrical%20Corrosion%20and%20ACZP.htm

One other thought, if you spend a lot of time cranking the engine without
it starting, you can pollute the crankcase oil with gas. So perhaps
you might pull the fuel pump fuses until it cranks normally.


Good luck, Bill