Fuel 1990 LX 2.3 hot no start

[LA racing]

This is why i was thinking you had multiple problems and not just one. Since you have 2 "motorcraft" icms, we will put that aside for now. I put it in quotes because 9 out of 10 times they arent actually motorcraft.
I was thinking the icm was getting hot and causing it to stall- that would be one problem. How many miles on this engine?

160,000 Kilometers.. 99,000 miles

 

[89ripper]

Ok. I originally thought that since starting fluid gets it to run, your injectors may be suspect. I understand cold starts are fine, but like i said could be compounding issues with your car. Let me look into the testing procedure for your engine.

 

[AeroCoupe]

If the car runs with starting fluid after it shuts off that tells me it has spark. I would suspect one of two things. Either the TFI module is overheating or the fuel pump is failing. Did you put thermal paste between the TFI module and the distributor?

 

[LA racing]

If the car runs with starting fluid after it shuts off that tells me it has spark. I would suspect one of two things. Either the TFI module is overheating or the fuel pump is failing. Did you put thermal paste between the TFI module and the distributor?

Yes I put thermal paste between the TFI and the distributor.
Fuel pressure is good when the car is hot

 

[AeroCoupe]

if the fuel pressure is good hot and the injectors are firing but it won’t run and then you feed it starting fluid and it runs means no fuel.

 

[LA racing]

if the fuel pressure is good hot and the injectors are firing but it won’t run and then you feed it starting fluid and it runs means no fuel.

I agree I believe it's a fuel issue as well. But I don't know what else to check or look at.

 

[AeroCoupe]

Okay, so is what I stated correct? Yes or no. Also, when it shuts down are you able to monitor fuel pressure? If so does it stay steady, slowly drop off, drop to zero immediately, or ???

When the motor quits running the fuel pump will shut off.

You could also have a failing ECU.

 

[LA racing]

Okay, so is what I stated correct? Yes or no. Also, when it shuts down are you able to monitor fuel pressure? If so does it stay steady, slowly drop off, drop to zero immediately, or ???

When the motor quits running the fuel pump will shut off.

You could also have a failing ECU.

What you stated is correct yes.
Yes I have monitored fuel pressure when it shuts off. It jumps up a few psi when it shuts off and stays there for 3 minutes. It will then very very slowly start to move down.

 

[AeroCoupe]

Man I would suspect the ECU shutting things down. Might be time to send it off to ECU Exchange and have them go through it.

Home - ECU Exchange

ECU Exchange specializes in the re-manufacturing and repair of engine control modules.

www.theecuexchange.com

 

[89ripper]

ICM lol....been a long week workin on gms.
Do what aero says and consider an ecu exchange, its fixed a lot of the issues that i had with my car.

 

[LA racing]

Man I would suspect the ECU shutting things down. Might be time to send it off to ECU Exchange and have them go through it.

Home - ECU Exchange

ECU Exchange specializes in the re-manufacturing and repair of engine control modules.

www.theecuexchange.com

I have a few guys locally that have some good ICM's that I'll check out..
I have opened it up and it looked like newer unit. All the caps looked great.

 

[AeroCoupe]

The ones they have are 30+ years old as well. It’s not just the caps they replace. Just send it and then you will know for sure it’s in good shape.