For some reason on hot days my tachometer when I start up my car goes all of the way past red line and sits at like 10K rpm's. My engine temp is normal and when I drive it the car works fine but the gauge just sits there. It only does this in hot weather (100F and up). If anyone has an idea why this is happening please share, because I have no idea!

Originally posted by Stryder

....... It only does this in hot weather (100F and up).

Good thing you're from san francisco, shouldn't happen too often in your area. :pirate: