Shut off while driving no fuel or spark

Hi,

What I need you to do first is check for diagnostic trouble codes. This vehicle has an obd1 system and a scanner is not required to retrieve codes. All that is needed is a short jumper wire or even a paper clip. Here is a link that explains how it is done. Do this and let me know the codes you find.

I have a feeling it is related to the ignition control module. If it fails, it shuts off the injectors as well. However, you still should have fuel pressure from the pump.

Try this and let me know.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Take care,
Joe

So I did it; codes 12 15 22.

Now I know that the coolant is low because I unplugged the wire to the thermostat but would not have any merit in. What's wrong here?

Replace the sensor, code went away but still no start.

Was it the coolant temperature sensor you replaced? That is what is related to the code 15. That sensor won't cause the no spark/fuel issue.

Just to confirm, there is no spark or fuel to the engine, correct?

Let me know.
Joe

Yes no spark or fuel. I replaced the TPS code went away.

All codes are gone except for 12.

According to the manual, code 12 is a false code. Take a look at the attached pic. That is what I find when looking for a code 12. Are you certain that is the number?

Joe

Yes 1 flash then 2 flashes.

I'm confused about what you mean by the picture. Can you explain it a little bit?

Yea, I have done it more than 1 time.

Basically, I attached the pic so you could see, according to Alldata, there is no relevant code for 12. Have you checked for a good ground and power to the PCM?

Joe

How do I check the PCM?

First, before you unplug or reconnect any control module (PCM) make sure the battery is disconnected. You can reconnect the battery after the component is disconnected or reconnected.

I attached a pic of the location of the PCM. To start, first locate and confirm the connections are tight. If they are, disconnect the battery and then unplug the PCM. Check for corrosion, dirt, or any damaged pins.

Let me know what you find.

Joe

Not to bad.

Got it running, but running rough.

Replaced the ICM.

Great! Have you rechecked for diagnostic trouble codes that may indicate the cause of the rough running?

Joe

Yes.

Not sure if It's fuel filter or pickup coil.