84 - Injector will not fire - engine will not start

[JTK]

1984, 75K miles, no codes except 12, new stock fuel pump and coolant temp sensor. In Dec. I changed the fuel pump due to the car has 75K on it. It made a huge difference in starting. It fied up instantly! I retired a couple of weeks ago and looked forward to working out in the shop. The car hadn't been started in a couple of weeks but started first crank. As usual I let it warm up and let the fans cycle 3 or 4 times before shutting it down. Two days later when I tried to start it I ended up using starter fluid to get it to start. It took a lot of nursing it along with the starter fluid before it would run on it's own. If I tried to give it some throttle it would back fire through the driver side TBI. I gave up for the day. Next day I changed the battery back to full charge while I put a pressure gauge in the fuel line between the TBIs. With the key ON and cranking the engine I had 13psi and it held that 13psi for an hour that I watched it. I checked to see if I had spark to the plugs with my timing light and I have spark. Plugs are all good with a light brown color. Next I thought I would find some codes but only got code 12. While waiting for the codes to cycle I could hear something making an intermittant sound at the TBI area. I suspected the idle air control and when I unplugged them it stopped. TBIs will not let fuel through.

[c4c5specialist]

Hi there,

Your fuel pressure is very good.

Your next course of action is to determine if you have spark.

If you DO, that means that your injectors or PCM may have a problem.

You see, the pulse from the distributor pick up coil fires both the ignition coil and SENDS the signal to the ECM to fire the injectors.

Take a resistance test of the fuel injectors individually and let us know what you have.

Allthebest, c4c5

[JTK]

Thanks, I'll check the resistance on the injectors. What value in ohms should i look for?

[JTK]

Originally Posted by JTK

Thanks, I'll check the resistance on the injectors. What value in ohms should i look for?

I checked the injectors and they show 1.4 ohns for the front one and 1.3 for the rear one. I went back and checked for spark with a spark gap tool and have no spark. Checked the pink wire to the distributor with key in ON and START positions and do not have voltage. (12.3V) at battery.

[c4c5specialist]

Hi there,

Ok, then thats great. Your lack of battery power is telling you that you need to trace that circuit.

Once I get to work, I will check the schematics and post up.

Allthebest, c4c5

[JTK]

Originally Posted by c4c5specialist

Hi there,

Ok, then thats great. Your lack of battery power is telling you that you need to trace that circuit.

Once I get to work, I will check the schematics and post up.

Allthebest, c4c5

Find any schematics yet? Thanks, jtk