 Pertronix Question |
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| Ansbacher |
 Feb 6 2020, 05:20 PM
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#1
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Senior Member  Group: Members Posts: 689 Joined: 4-July 14 From: Tampa Bay, Florida Member No.: 17,589  |
It is an accepted fact that the ORIGINAL Pertronix Ignitor (not the II or II versions) will fail if the ignition is left on and the motor is not turning. My question is HOW LONG does the ignition have to be on before the Pertronix burns fails? I have carbs and like to turn my ignition on to prime the bowls for about 10 seconds prior to cranking the engine. Will that result in Original Pertronix failure or does it have to be on for a more extended period? I know that I could wire an independent switch to activate the fuel pump, but am trying to avoid that if unnecessary. Thanks for any input.
Ansbacher |
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| raynekat |
Feb 6 2020, 05:54 PM
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#2
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Advanced Member Group: Members Posts: 2,169 Joined: 30-December 14 From: Coeur d'Alene, Idaho Member No.: 18,263 Region Association: Pacific Northwest 
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Pertronix are magnetic points.
Shouldn't matter how long you leave the ignition on. It's not like "points." The shouldn't fail in this mode of leaving the ignition on. I've had these in a couple of cars and never had a problem ever. |
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| 914werke |
Feb 6 2020, 09:02 PM
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#3
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"I got blisters on me fingers" Group: Members Posts: 11,085 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
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This issue isnt how long, but in the event that the magnetic PU/inductor happen to be aligned in that circumstance (Ign. key on), coil current can be allowed to flow and overload its circuit....I think
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| Ansbacher |
Feb 6 2020, 09:03 PM
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#4
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Senior Member Group: Members Posts: 689 Joined: 4-July 14 From: Tampa Bay, Florida Member No.: 17,589 |
QUOTE(raynekat @ Feb 6 2020, 06:54 PM)  Pertronix are magnetic points. Shouldn't matter how long you leave the ignition on. It's not like "points." The shouldn't fail in this mode of leaving the ignition on. I've had these in a couple of cars and never had a problem ever. The "original" Pertronix Ignitor WILL fail if ignition is left on. That is why Pertronix added safety circuitry in the Ignitor II and III versions to prevent that. I just want to know how long of an exposure to ignition on juice without cranking will take it out- seconds, minutes, hours? Ansbacher |
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| Tdskip |
Feb 7 2020, 10:04 AM
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#5
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Advanced Member Group: Members Posts: 3,703 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None
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As said directly above that is a major No No. Common failure cause that people overlook and then get upset at Pertronix over.
Ignition off unless running. How long OK to leave on, that is a tough one. Minute or less but that is unscientific... |
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| iankarr |
Feb 7 2020, 10:09 AM
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#6
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,538 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region
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I remember reading somewhere in the installation instructions a while back that they recommended "no more than 30 seconds." But get the II (IMG:style_emoticons/default/wink.gif)
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| 76-914 |
Feb 7 2020, 10:55 AM
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#7
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,663 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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(IMG:style_emoticons/default/agree.gif) 30 seconds is the critical mark. (IMG:style_emoticons/default/beerchug.gif)
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| brcacti |
Feb 7 2020, 12:41 PM
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#8
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1974 914 1.8 Group: Members Posts: 674 Joined: 17-July 19 From: PHX AZ 60 miles south Member No.: 23,302 Region Association: Southwest Region |
JUST WONDERING, is this issue something I have to worry about with the xr700 ?
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| Mark Henry |
Feb 7 2020, 01:13 PM
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#9
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(brcacti @ Feb 7 2020, 01:41 PM) JUST WONDERING, is this issue something I have to worry about with the xr700 ? No, Pertronix 1 I think it would take more than 30 seconds, but who knows. I've replaced a few for customers, but I've never personally had one fail. When ever I work on body electrical I just pull the + lead off the coil, MSD, etc. |
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| cosm3os |
Feb 7 2020, 05:32 PM
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#10
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Newbie Group: Members Posts: 22 Joined: 26-December 19 From: Valparaiso, IN Member No.: 23,766 Region Association: None |
Is there a way to tell if I have I II or III. Been doing electrical work, and I know I've had the ignition on
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