 Low emi/noise ignition bits |
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| emerygt350 |
 Sep 18 2026, 06:48 PM
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#1
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Advanced Member  Group: Members Posts: 3,740 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States  |
I am having some suspected electromagnetic interference issues. My car produces a ton of it. So bad in fact, the last time I took it to the dyno the machines computer wouldn't even work. Now I suspect I am getting voltage spikes to my new 123 causing it to flake out. I am getting electromagnetic field strengths of over 2000 v/m in my engine compartment. Is that normal? Is there anything I can do? Better spark plug wires?
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| dtmehall |
Sep 18 2026, 07:17 PM
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#2
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Member Group: Members Posts: 363 Joined: 21-December 23 From: Michigan Member No.: 27,808 Region Association: Upper MidWest |
these work well for me
Magnecor Spark Plug Wires https://lnengineering.com/products/aircoole...ark-plug-wires/ |
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| porschetub |
Sep 19 2026, 12:25 AM
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#3
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914 Guru Group: Members Posts: 5,174 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Clewett Engineering have two brands, their own and Magnecor ,seem to cover the issues the OP has .
Running Clewett leads on my 2.2 six engine and been very happy with them . Cheers. |
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| emerygt350 |
Sep 19 2026, 05:53 PM
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#4
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Advanced Member Group: Members Posts: 3,740 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Those look good. When I get a moment I am going to grab some.
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| TRP |
Sep 20 2026, 03:15 AM
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#5
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Member Group: Members Posts: 450 Joined: 2-September 23 From: Morgan Hill, CA Member No.: 27,559 Region Association: None 
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I have the Magnacore wires on my car, they are a bit long, but seem to work. Your comment about your 123 being spotty makes me wonder if we are having similar issues. What are you experiencing? My 123 distributor getting a bit wonky while under power, mostly above 2500 rpms. The car idles fine and revs clean to 3200 in neutral; the car will surge and pop while under power. I thought this was lean popping and missing/surging due to something with the AFM (1.8) or an imbalance because of the GoWesty throttlebody. I reverted back to stock throttlebody, same issue. When I swapped back to the OEM distributor, the car drives well.
I sent the 123 back to get inspected. They swapped out a board and sent it back. It is waiting at home for me to reinstall it when I return from this business trip. Im now wondering if it's emi or something. Do you have resistor plugs? Are your distributor power wires isolated from the plug wires / other electronic signals? |
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