when I first start the engine, the gauges all go haywire. The hot indicator goes all the up. The fuel indicator goes all the way to full, even if the car has only 1/2 tank. The mileage indicator indicates 9999999. The speedometer sometimes does not work. And the gauge with single numbers start shaking.

Like I said, the gas and temperature gauges will go all the way up, then continue to bounce up and down repeatedly