Static Noise After Tune Up

BLUES WITH A FEELING

MEMBER
2000 GMC JIMMY
6 CYL
4WD
AUTOMATIC
115,000 MILES

Car Type is a 2000 GMC Jimmy SLT. I have been hearing a static sound since my car was tuned up last week. This sound is present whether or not the radio is turned on. It is doing it intermittantly, however, it seems to occur most when idling at a light.
This sound was not happening at all before the tune up was done.
Any advice would be welcomed.

1 Reply

JDL

MECHANIC
16,098 POSTS

Radio/Audio System Operation
Use a noise sniffer with the vehicle radio in order to locate hot spots. Hot spots generate radio noise interference. Hot spots may be found in the following locations:

� In the harness
� In the upper part of the dash
� Between the hood and the windshield
Construct the sniffer using an old piece of antenna lead-in. Obtain an old piece of antenna lead-in from a mast or a power antenna. Use as long a piece of lead-in as is available.

When the sniffer is plugged into the radio's antenna socket, the 2 sections of the wire in which the black coating and braided shield are stripped back become the antenna. The sniffer may then be used in order to probe and search out hot spots.

Place the sniffer parallel to the wire in order to achieve the best results when you test for noise on a wire.

Perform the following steps in order to use the sniffer:

� Tune into the complaint noise.
� Disconnect the antenna.
� Plug the sniffer into the antenna socket.
� Turn the radio volume UP.
� Search for the noise source.
Do not touch the 2 probes.

I have never used a sniffer before. Were oem spark plugs and plug wires used? Start the vehicle in the dark, raise the hood, do you see any arching/lites anywhere.