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I'm confused. Perhaps it's the difference in language or terminology.
For example, you say, "I checked the voltage drop from coil terminal 15, it read 9.6v then it went up to 10.3 with a fully charged battery."
Was this while trying to start, with the Battery + jumpered to Coil #15, as I suggested last Friday?
If you had a normal 12v which then "dropped" to 10.3v while cranking, that would be a DROP of 1.7v, and probably in the accceptable range.
"Then I jumped a wire from the + battery to coil terminal 1 and there wasnt any spark," I NEVER said to run a jumper to Coil #1. Nor did I suggest this would produce any spark (it won't). I don't know what putting +12v to Coil #1 would do. Possibly damage the ICU.
Here are my words from Dec. 11th:
"TRY THIS: Run a temporary jumper wire directly from the Battery + to Coil + 15, and see if you then get a spark while cranking..."
So far you haven't said if you tried this test or not. I can only guess that is what you were doing when you measured 10.3v. But guessing opens the door to confusion.
Coil #1 normally "sees" only the voltage that comes through the Primary coil winding from terminal #15.
I believe that would be the case with Key ON, until the ICU grounds it and opens it periodically during cranking to create sparks.
"I check for voltage in terminal 1 too and it did the same thing as the coil terminal 15."
You mean it read the same voltage? That would be normal in a static (not cranking) condition, as explained in the preceding paragraph.
"Maybe the ICU isnt interupting the terminal 1 or the distributor is'nt sending the messege to the ICU."
Yes, either is possible
"How can I run some more tests"?.
First I need an answer to my question of yesterday — "P.S. Is the 3-wire Distributor Plug round or rectangular (Bosch) shaped?"
I need to know this in order to describe further testing. With no answer for me to build on, today is wasted.
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Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.
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