GTV Anyone Ever See This Coil Set Up? - Alfa Romeo Bulletin Board & Forums
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post #1 of 6 (permalink) Old 09-17-2017, 02:50 PM Thread Starter
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GTV Anyone Ever See This Coil Set Up?

I am trying to start a 73 GTV that has been sitting for 20 years. The car turns over with the key and I rigged a temp. gas tank and getting fuel to the carbs.

Cleaned the points but no spark yet. This is the coil setup that was in the car. I hooked up a used blue Bosch coil with only the 2 wires (one from wire loom on the firewall and one going to the distributor but nothing yet.

Do I need the wiring shown on the old setup?

Also, I have this wire connection just sitting there. Comes from the starter.

Thanks!
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post #2 of 6 (permalink) Old 09-17-2017, 03:35 PM
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I am trying to start a 73 GTV...This is the coil setup that was in the car.
Yes, that's the stock set-up: a Marelli coil + an external resistor.

Looking at your picture of the old coil, two things have me puzzled:

- There is a pink or brown wire attached to the same coil terminal as the red lead from the resistor. Where does that pink or brown wire go?

- What is that white, cylinder-shaped thing to the right of the coil in the photo? Is that where the pink or brown wire goes?

Quote:
I hooked up a used blue Bosch coil with only the 2 wires (one from wire loom on the firewall and one going to the distributor but nothing yet. Do I need the wiring shown on the old setup?
No, you don't need the wiring shown on the old setup - a Bosch blue coil doesn't need a resistor. You have it wired correctly.

Quote:
Cleaned the points but no spark yet.
Do you have +12V at the coil "+" terminal? If so, it should produce spark.

Quote:
Also, I have this wire connection just sitting there. Comes from the starter.
That is another part of the stock wiring. One end attaches to the starter solenoid, the connector with two wires went to the cold start solenoid on the Spica pump, and the third terminal went to the "+" terminal on the Marelli coil. Since your Bosch blue coil doesn't use a resistor, the connection to the coil "+" is no longer needed - just insulate that connector and secure it somewhere so it can't short out.

Jay Mackro
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'65 Guilia Sprint GT
'67 Duetto
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Last edited by Alfajay; 09-18-2017 at 05:53 AM.
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post #3 of 6 (permalink) Old 09-17-2017, 04:43 PM Thread Starter
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Yeah, that brown wire goes from the coil to that round aluminum, looks like a relay, part on the inner fender wall. It has two spades on it and looks like it says SIPEA on top with the numbers 1F D8. I'll check the voltage at the coil tomorrow.

I should have caught that black wire from the starter. I have a GTV with SPICA. Would have been easy to walk over to the other car eh?

Thanks, Jay!

John

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post #4 of 6 (permalink) Old 09-17-2017, 04:54 PM
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The red wire from the ballast resistor should go to the +ve terminal of the coil, the same one that has a green wire. The -ve side of the coil should go to the distributor.

Ed Prytherch
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post #5 of 6 (permalink) Old 09-17-2017, 05:00 PM
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Quote:
Originally Posted by johndewaele View Post
Yeah, that brown wire goes from the coil to that round aluminum, looks like a relay, part on the inner fender wall. It has two spades on it and looks like it says SIPEA on top with the numbers 1F D8.
I'm guessing it is some aftermarket device (capacitor to reduce radio interference? If so, it should attach to the coil "-", not "+"). The tie wrap mounting sure doesn't look like something the factory would have done. I'd leave the thing unconnected.
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Jay Mackro
San Juan Capistrano, CA

'65 Guilia Sprint GT
'67 Duetto
'91 164L
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post #6 of 6 (permalink) Old 09-17-2017, 05:05 PM Thread Starter
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Yeah , the wire tie did not come from the factory! Interesting setup; thanks guys!

Ya say ya don't have a ticket, walk in backwards, they'll think you're coming out!
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