Does the fuel system AND ignition cutout as well?

 

The fuel injectors have power :: sitting :: on them with the closing of the large ECU control relay

The ECU provides the timed ground for each injector for proper fuel injection

This large relay is controlled by the ECU and brings power back into ( sepeate juntion splice ) the ECU to funtion as the 2nd power

The 1st power source is the right engine bay fuse box relay

ECU needs both power sources at all times

 

Have you reset the inertia / crash switch ?

Is your starter sag voltage staying up and not taking a dive

 

If yo mean the inertia switch, then only the fuel pump is disabled. The car will want to start, but never turn over, since it gets no fuel....until you run out of battery.

 

I jumped the inertia switch and attempted to start the car. This time, no starter either. I reset the switch and connected the connector to the switch. Starter worked....but no start. ,

So, with respect to the relay in the trunk....I put a universal relay there instead. No start.

I'm confused with regards to a second relay under the hood in the engine compartment you mention?!

Sag time?

 

Large right # 5 relay for the injector power

right engine bay fuse box relay # 9 for the 1st power to the ECU

Input from others have helped me think more of other items to check for starter sag

Laptop computer recharge brick going out as well as spare

 

Check the fuel pressure!

 

The fuel pump relay will click in your finger 3 times in engine starting sequence

On for 3 seconds then off then back on when CKPS sees engine rotation

The fuel pressure should be trapped in the fuel lines between relay closing

You can slightly remove a fuel line nut to see if you have some dripping pressure as a crude knowledge

Use 2 wrenches least twisting the tubing

Fuel pressure is 43 PSI

Sometimes there is a small leak of the trapped fuel pressure like overnight and requires a couple of rotations of the key to the run position to get the pressure up , this gives you more then 1 count 3 second fuel line charging ( different then cylender priming term )

 

Have you put your cylinders in a bore wash condition?

Do you get a couple of combustions like 1 , 5 , 10 count ?