Did we know this?

[85MercPark]

Electric fuel pump circuits are equipped with an interlock system which provides power to the pump during start-up, through the starter relay, and provides operating voltage during engine operation. Should the engine lose oil pressure, the pump is automatically disconnected, stopping the engine.

[boXman]

CFI only?

[85MercPark]

Not sure, here's the whole article

Description
Ford Mustang/Capri 1979-1988 Repair Guide


Central Fuel Injection (CFI) is a throttle body injection system in which two fuel injectors are mounted in a common throttle body, spraying fuel down through the throttle valves at the bottom of the body and into the intake manifold.
All 1984-86 models with CFI are equipped with two electric pumps. A low pressure pump is mounted in the tank and a high pressure pump is externally mounted.

Electric fuel pump circuits are equipped with an interlock system which provides power to the pump during start-up, through the starter relay, and provides operating voltage during engine operation. Should the engine lose oil pressure, the pump is automatically disconnected, stopping the engine.
Fuel is supplied from the fuel tank by the combination of a low pressure, in-tank fuel pump and a high pressure, in-line fuel pump. The fuel passes through a filter and is sent to the throttle body where a regulator keeps the fuel delivery pressure at a constant 39 psi. The two fuel injectors are mounted vertically above the throttle plates and are connected in line with the fuel pressure regulator. Excess fuel supplied by the pump, but not needed by the engine, is returned to the fuel tank by a steel fuel return line.
The fuel injection system is linked with and controlled by the Electronic Engine Control (EEC) system.

[85crownHPP]

thats interesting... that would mean the oil pressure sender/sensor is wired into the ECM.
If I hadnt removed my oil sender wire Id go ground it out while the car runs to see if this works!!!

[87vicFIVEO]

Someone needs to start their engine and then pop the oil drain plug and see what happens!

[85crownHPP]

[nitroracer]

Never had a clue. I do know about the fuel pump shut-off switch in fords though.

[Lincolnmania]

that article is wrong.......cfi panthers only have one fuel pump

[85crownHPP]

its says the article is for mustang/capri

[gadget73]

yeah, I don't think the Panther wiring for the idiot senders has any connection with the ECM or fuel pump relay.

[grandpaslincoln]

Mine don't

[CheeseSteakJim]

Someone needs to start their engine and then pop the oil drain plug and see what happens!

I didn't pop the drain plug, but something similar happened to me to prove this theory. My old '90 Crown Vic I owned a year or two ago catastrophically blew its oil pan gasket one damp fall morning while the car was warming up in the driveway. It lost all its oil (and along with it, its oil pressure) and shut itself off, and refused to start up for the next couple days. After a couple days I tried to start it up and it started up fine.

I always figured it was some sort of safety that shut off the engine when it was running way too hot... I guess this is what it was.

[gadget73]

probably you seized the engine lol.

I can tell you with reasonable authority that at least on a 1986 model Panther, there is no connection between the oil pressure switch and the ECM. There is nothing between the fuel pump relay and the pump itself except the inertia switch. Mustangs are probably totally different. This information brought to you by the 1986 Lincoln Town Car EVTM.

[85MercPark]

That would be a good option for someone to figure out. Shouldn't take much to do for some of the electrical gurus here.

[CheeseSteakJim]

probably you seized the engine lol.

I can tell you with reasonable authority that at least on a 1986 model Panther, there is no connection between the oil pressure switch and the ECM. There is nothing between the fuel pump relay and the pump itself except the inertia switch. Mustangs are probably totally different. This information brought to you by the 1986 Lincoln Town Car EVTM.

After a couple days I tried to start it up and it started up fine.

I highly doubt I seized that engine, because before I had it junked I tried to seize it by alternating between doing brakestands outside my house and doing 65mph with only enough oil to touch the very tip of the dipstick. I warped the heads so badly that it was burning coolant and spraying it out of the area around the headgaskets in the form of white smoke... but I'll be damned if that car wasn't still running when the flatbed came to pick it up.