Does "I am not seeing any spark from the coil." mean you pulled the coil wire out of the Opti, and are holding the metal terminal end of the coil wire near a good ground, like the engine block? Since the coil, the coil wire, and the Opti have all been replaced, the terminals the coil wire plugs into should all be free of corrosion, and the coil wire should not have a break. Just to check, measure the resistance of the coil wire to insure there are no breaks.

Next, measure the resistance of the coil secondary wiring by measuring the resistance between coil pin "A" an the metal coil wire terminal. Shoebox's procedure shows the two-connector 1993-95 coil, but I assume the resistance of the secondary winding should be similar. You are only looking for an open circuit on the secondary winding.

http://shbox.com/1/coil_testing.jpg

Gary: please insure this info is correct. As you have pointed out elsewhere.... you're the electrical engineer, I'm only a mechanical engineer.

 

Yes when testing the spark from the coil I am holding the end of the coil wire up to a ground. I also have tried two different new coils and coil wires but I will do those tests. Thank you for your continued assistance

 

So I measured the coil and it’s showing 5600 Ohms so coil is good

I went back to the drawing board since it had been weeks since being able to touch the car

I have found that the ground on the ICM connector is reading OL…I just put new ends on the two wires and replaced the braided ground strap at the coil mount … any suggestions? I see on the wiring diagram that black wire goes to ground cell 14 but not sure exactly what that means or where? Does the black ground wire go somewhere else or just to the coil mount stud?

 

You're misreading the diagram, if you are looking at the one on Shoebox (which is a copy of the factory service manual):

http://shbox.com/1/1996_ec_03_ign_system.jpg

The diagram indicates the ICM ground wire - pin "C" - is black and connects to the ground designated as "G111". G111 is the stud that holds the ICM/coil bracket. The black wire from the ICM goes into the harness and joins a splice (S108) inside the harness where other wires from Cell 14 join it, so they all get grounded at G111.

There are 5 black wires from Cell 14 that connect to splice S108 along with the ICM wire, which ultimately connects all of them to G111, and includes the ground wires from the A/C compressor clutch/diode and the four O2 sensors. The second wire from Cell 14 is actually 2 tan/white wires that ground the PCM to G111, and are not connected to the splice. Reference 1996 factory service manual page 8A-14-0.

To measure the continuity of the ICM ground you put one lead of the meter on pin "C" of the ICM, and the other lead of the meter on the stud that holds the ICM/coil bracket. If your meter has a continuity feature, the light should come on confirming continuity. If you are measuring with the ohms scale, set the meter at the lowest ohms scale, and it should read very close to "0".

 

That’s exactly the test that I performed and came up Open as I stated…I suppose it’s time to start tracing that black wire back through the harness

I should note that I got this vehicle not running from the start so I have no idea what was working or not working prior

Thanks for the continued help

 

I wasn't sure what you meant by "ground on the ICM connector is reading OL…"

The factory service manual indicates the S108 splice is in the harness about 5cm from the #5 fuel injector breakout. Shoebox has a good harness photo:

1995 Z28 A4 Engine Harness

http://shbox.com/1/harness7.jpg

Try running a jumper wire directly from pin "C" of the ICM to the ICM/coil stud.