Join Date: Feb 2001
Location: Bremerton, WA.
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Re: engine noise interference on the radio?
Typically what people consider motor noise is the high pitched whine that fluctuates with motor rpm. These noises are usually (over 75% of the time) caused by a ground problem. Whether the problem be at the radio, antenna mount, vehicle ground plane, etc.
The other motor noise which mainly is noticeable with cassette tapes is a popping noise that fluctuates with rpm. This type of noise is normally caused by non-resistor plug wires, bad wire, ignition wires ran by radio (Ford trucks are notorious for this). This second type of noise is actually easier to troubleshoot by taking your walkman and listening to it while moving it around under the dash or under hood. When you get close to the source it will get louder. In my twelve plus years of doing custom install, noise problems are the most time consumign and most expensive, and almost always turned out to be ground problems in the system, vehicle or both.
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