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Pertonix install no start, help?
Hi I tried installing a pertronix ignitor in my '77 911s with stock CIS and it doesn't start, can someone help me get the wiring right? I've taken a few photos of the mess I created.
Here's what I did. 1) I pulled out the points, and installed the ignitor. 2) Then I connected the red wire from the ignitor to the 12volt wire that originally went to the points and the positive probe on my volt meter, connected the loose black wire from the ignitor to my negative probe on the volt meter. With the ignition on I turned the engine by hand and watched the voltage alternate between 0 and 12.5 volts as the distributer turned. I think the ignitor unit is working. 3) I connected the black wire from the ignitor to the negative on the ignition coil. I tried starting it and it without luck. 4) I checked the resistance across the ignition coil and it showed 2ohms. The resistance across the 1.5 ohm flame thrower in my other car was 2.5ohms so I think the coil is probably ok. 5) I pulled the spark plug wire out of the ignition coil and held it .5 cm away form the lead. I had a friend turn the key and crank. I saw a spark from the coil right when he turned the key, then nothing when he cranked the engine. We tried it a few times just to be sure. I thought the 12 volt wire to the points was the ignition... I was hoping to get some advice before I really screw something expensive up. ![]() ![]() ![]() ![]()
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Steve '66 912 - Polo Red; '74 911s - Silver Carrera RS clone '77 911s - Peru red IROC Clone '89 964 C4 - Guards red |
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Bollweevil
Join Date: Dec 2003
Location: Fulshear, Texanistan
Posts: 3,361
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If you will search this forum for "Pertronix" I think you will find numerous threads on how to install your Pertronix Ignitor...
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Jack 74 911 Coupe 2.7L - K21 Option - S suspension |
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Registered
Join Date: Jan 2006
Location: Santa Barbara, CA
Posts: 2,307
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IIRC, you never connect a Pertronix to either side of the coil on a Porsche with a CD box.
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jhtaylor santa barbara 74 911 coupe. 2.7 motor by Schneider Auto Santa Barbara. Case blueprinted, shuffle-pinned, boat-tailed by Competition Engineering. Elgin mod-S cams. J&E 9.5's. PMO's. 73 Targa (gone but not forgotten) |
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Goose- "nothing a year in the tropics wouldn't fix" |
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I think you have it wired wrong. The black wire does the same thing as the stock points wire did. So that wire goes to the CDI box trigger lead. Again this is the same as the single wire in the points system.
The RED wire is for switched 12 vdc. This is a new wire has to be wired into a circuit that is energized by the ignition switch, this is called switched 12VDC. This red wire energizes the Pertronix with 12 volts. Everything else stays the same. If you have a CDI the black wire goes there and NOT TO THE COIL! Other things to check: The position in which the Ignitor red wire is attached to is not supplying sufficient voltage. The air gap between the module and magnet sleeve is too great. The ground wire inside the distributor is not connected. The wire connections are not tight. The polarity is not correct.
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RGruppe #79 '73 Carrera RS spec 2.7 MFI 00 Saab 95 Aero wagon stick 01 Saab 95 Aero wagon auto 03 Boxster 90 Chevy PU Prerunner....1990 Last edited by dicklague; 01-17-2014 at 05:07 PM.. |
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