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Why does my AM radio click only at speed?
Not at idle, not when I rev the engine.
Only after about 20-25 mph.
Some days more than others.
Odd
I am using resistor spark plugs.
Yes I'm an old fart and I listen to AM news and talk radio.
That's almost certainly electrical noise from your tires. Static buildup from the tires rotating at speed discharges, causing the clicks on AM radio. It's a common issue. A static strap from your axle to the ground can often fix it.
That's almost certainly electrical noise from your tires. Static buildup from the tires rotating at speed discharges, causing the clicks on AM radio. It's a common issue. A static strap from your axle to the ground can often fix it.
Thank you, I'll try that!
I learn a lot here - never would have thought or considered that but it makes so much sense to what it's doing
Each tire?
I really noticed the clicking and poping increase when I got new tires
Do I also need to better ground the engine to the frame with a wire as they are isolated with rubber?
Or the radio better grounded to the frame?
I remember seeing these on cars a long time ago - a strap draging the ground from the bumper (when bumpers were steel) or exhaust.
Haven't seen one one 40 years.
Last edited by Robertbc3141; Oct 14, 2025 at 07:12 AM.
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AM radio clicking
