Engine stalls during excessive heat?

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

Hi Marin,

Have you checked the Auto Shut Down relay? This relay is controlled by the PCM and will cut power to the injectors and ignition coil if the PCM sees an issue. However, the relay itself can fail and you will lose power to the fuel system and ignition system.

Here is a little more detail about it. Please let me know if this is not it and we can go from there. Thanks

Can you give more detail about what module you replaced? You said the SBEC module but I am not familiar with what that is.

If you don't have power to the fuel pump or the ignition coils, I suspect you have a PCM issue. The PCM controls the ground for each of these systems.

Let me know what is meant by the SBEC Module and we can go from there.

Okay. I am not sure why I didn't pick up on this earlier when you mentioned it. The pickup in the distributor is used to determine crankshaft position. If the PCM is not getting this signal it will shut down the ASD, fuel pump relay, and ignition.

I am pretty confident that this is your issue. Here is the procedure to replace it in case you need it.

Please let me know how this turns out. Please notice the highlighted portion of the first attachment that will pretty much confirm this.

Sorry, I am not sure why I overlooked this earlier.

If you have no voltage on any of the circuits then have you checked the inline connector from the PCM to the distributor/coil? Each of these circuits run through the inline connector that is at the rear of the battery.

I highlighted a few of the circuits. Specifically the coil driver circuit (this delivers the voltage for the primary side of the coil), the 9 volt supply circuit for the distributor, and the signal return which is what the PCM needs to fire the injectors and coil.

Take the connector apart and see if there is any water intrusion or burn marks that indicate a short circuit.

Worst case, I would measure voltage coming out of the PCM for the 9 volt supply and driver circuit and see if you have voltage coming out. I suspect you will and if so, just cut the wire and run your own wire directly to the distributor. Do this for each wire and that will ensure you have power and return.

Let me know what you find.

Is there a way that you can get a quick video showing how you have the meter hooked up because I think I am missing something? If you have power to the coil, which it sounds like you do, then you just don't have the signal to deliver the spark which would be the distributor. It is actually the pick up inside the distributor but I would expect you to at least have your supply power which is why I want to see how you have it hooked up.

Thanks

Could be tune uo time. Plugs, wires, etc. Problems seem to show up when cold. Also try a new fuel filter and some fuel injector cleaner.

Good luc and let us know. :)

What exactly is cold in Mexico City?

OK, Is your check engine light on? If so pull codes.

It could possible be the MAP Sensor(Manifold Absolute Pressure Sensor)