Greetings,
I have a 1996 Trooper with 112k miles. When driving at highway speeds, say
40+ mph, there is a distinct buzz that comes from the dash where it meets the windshield (at least to my ears while driving). Most of the time it will stop if I let off the throttle, but sometimes it will carry on even after I do this.It is a very odd medium-frequency, plastic-metallic sound if that makes any sense. The frequency stays constant once it starts, that is, it doesn't get faster/louder as RPMs increase or decrease. It just carries on until I get down to street speeds or ease off the throttle.
Has anyone else experienced this? Could it be something loose at the firewall? Maybe the throttle cable isn't all the way secure and is banging against something? Overall driveability and performance don't seem to be affected and the truck runs like a top otherwise.
Thanks,
-Mark