No Start

Does it run if you spray starting fluid into the intake?

I don't see an engine size anywhere.

whats the 8th digit of the vin, thats the engine code.

I'm prolly wasting my time because most DIY play swaptronics instead of diagnosing problems to the source, but I'll give it a try.

If the ECM is in clear flood mode, it won't fire the injectors. The ECM uses the TPS sensor to determine clear flood mode. Measure the output voltage of the TPS sensor at the signal wire. With the throttle closed the TPS voltage should be somewhere around 1 volt. If the ECM is seeing 4 volts or higher from the TPS, it will disable fuel injection.

If the ECM isn't recieving the distributor reference signal from the ignition control module, it won't fire the injectors. Check for a reference signal to the ECM using a lab scope. I know what your thinking, the ECM must be getting the signal because the coil fires. Well, the coil isn't controlled by the ECM. The ECM only controls ignition advance. Base timing coil firing is done by the ignition control module. Infact, you could unplug the ECM and you would still have spark.

Before you condemn the ECM check powers and ground at the ECM connector. Check your 5 volt reference voltages to your sensors. Easiest one to check for 5 volts it probably the ECT sensor. If you don't have reference voltage to your sensors because there is short to ground in the reference supply, the ECM won't do anything because its 5 volt power supply is pulled low. You'll need a connector pinout to do this and a volt meter to check voltage drops.

Also check all your outputs amperage such as solenoids, coils, injectors, etc . You'll have to manually activate those outputs and use an amp probe to determine if a component is drawing too much current. If an injector pulls too many amps, the ECM will shut down that particular quad driver. It usually sets a code when there is a quad driver issue.

Don't replace an ECM until you know the ECM is getting what it needs. If you don't do this and you have a shorted output, you can fry your new ECM. If you have a pulled low 5 volt reference or poor powers and grounds to the ECM itself, your just wasting your time putting another ECM in. Thanks for the reply, I appreciate your help. But as a 45 year mechanics I don't pratices swaptronics, that is the reason I asked if anyone could tell me where to find a wireing diagram. Your diagnosis may be correct and I will check it. But the fuel pump doesn't run either. I worked on autos for 28 years and, at 62 years old went back to small engines ten years ago because arthritis has made it hard to do the auto work. Now I don't have access to the information I did when working as an auto mechanic. Thanks again for the respones.

I have verified that the fuel pump is working, fuel to injectors.

Your diagnosis may be correct and I will check it. But the fuel pump doesn't run either.

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Slight contradiction???

The ECM powers up when the ignition is turned on

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You stated you have no power at the orange wire. Do you have power at the orange wire for the fuel pump relay? The orange wire has a fusible link up at the battery junction connector in the picture HT provided. The orange wire is also the ignition feed for the ECM, so don't know how the ECM checks out if it doesn't have any power.

I don't know if the ECM is working correctly because I didn't have a diagram to tell me what pin on the ECM did what.

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But you do have the ECM pin numbers. I guess you just don't know how to read them.