Engine noise only in Am stations

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IIrjII

Copper - Posts: 103

Joined: October 12, 2003

Posted: October 14, 2005 at 2:31 PM / IP Logged

Hi. A few weeks ago we did an amp install with components in a Chevy astro van. All the Fm stations are fine, no engine noise. A couple of days ago the customer comes back and tells us he only gets engine noise in his am stations. Has anyone ever had that problem? What do I do to fix it? Thanks in advance for the help.

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: October 14, 2005 at 2:59 PM / IP Logged

It's usually caused by a bad antenna ground, either where it connects to the radio or where the antenna mounts to the vehicle. Also, many GM vehicles require an antenna adapter, and if this is not installed correctly the ground can be disrupted.

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tcss

Silver - Posts: 1,623

Joined: June 07, 2004

Location: United States

Posted: October 14, 2005 at 3:02 PM / IP Logged

Almost every GM truck, especially the V-6s, have this problem. If it's on all AM stations check that the antenna has a good ground. If it's just on the weak AM stations, he must do a tune up with resistor spark plugs and shielded plug wires.

There is no such thing as free installation!

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Engine noise only in Am stations

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