No spark after installing an Intel Itronix Analog digital dash?

1987 CHEVROLET SILVERADO
2,043 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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87SQUAREBODY
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So, I installed an Intel Itronix Analog digital dash in my truck all wiring going to the dash is correct everything works as it should. My problem is now for some reason the truck is not getting any spark. It ran perfectly fine beforehand. Absolutely no issues whatsoever. Also, I might add I'm getting 12v to the coil on the pink wire. When you turn it over, I get a voltage drop to about 10.5V but I figure that’s because of the voltage being pulled from the starter. Please help.
Apr 22, 2023 at 8:51 AM
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JACOBANDNICKOLAS
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Hi,

First, if you were working on/around the dash, check to make sure no fuses failed. As far as a loss of spark, if you have power to the coil, that is a good thing. And yes, the drop in voltage is due to the starter. As a rule of thumb, it shouldn't drop below 9.7V with the starter engaged. Otherwise, it can cause issues with the ignition system.

Do me a favor. I'm not familiar with what you installed. However, I do have the diagnostics related to testing the ignition system. (See pics 1 and 2 below)

Also, if you haven't already, you may want to check for diagnostic trouble codes. All you need is a short jumper wire or even a paper clip.

Here is a link you may find helpful:

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

Also, see if there is an injector pulse when cranking. If there isn't, it may be the pick-up coil in the distributor. It's odd timing, but anything is possible.

Let me know what you find.

Joe

See pics below.

Apr 23, 2023 at 1:45 PM
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87SQUAREBODY
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So, I am only getting a 12 code when I hook up an obd1 reader and count the flashes. If I am not mistaken that just lets you know the ECM is in diagnostics mode correct? And it’s the flashing after that first original one two flash that you would count right? Because if so, I am not getting any other codes.
Apr 23, 2023 at 9:12 PM
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87SQUAREBODY
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Also, I want to add I am getting an injector pulse as I can smell the fuel flooding the truck while trying to crank it.
Apr 23, 2023 at 9:13 PM
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JACOBANDNICKOLAS
  • Experienced Mechanic
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Hi,

I have a feeling the pick-up coil may have failed. The diagnostics above include checking it as well. That is where I would start.

Joe
Apr 24, 2023 at 11:29 AM
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87SQUAREBODY
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I will check it out and get back with you.
Apr 24, 2023 at 7:31 PM
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87SQUAREBODY
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I have ordered a pickup coil hoping to install this week some time if time allows I will get back with you.
Apr 26, 2023 at 12:31 AM
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