NISSAN PATHFINDER INTERIOR

When I Am Driving Down A Road And Let Off Of The Gas Pedal The Suv Gets Squirrely For A Second. Then When You Put Your Foot Back On The Gas...

So, The Tachometer Is Going Crazy. Doesn't Seem To Affect Transmission. It's Just Going Haywire. What Could Be The Cause?

When I Turn My Car On. The Screen Is Completely Black. I Can’t Turn On The Radio, Heat, A/c, Nothing. It Is Still Blowing Out Hot Air....