I have a new problem that started today. I took it for a test drive and the engine keeps accelerating when I take my foot off the gas pedal! The pedal is not sticking, it comes back to normal position but the car keeps accelerating as if I am still on the gas. It revs up until it hits redline and then it dies back down. Also, I had over half a tank of gas before the test drive and now the gauge is reading almost empty.
What would cause this?!?! ...and could it possibly be related to my other running issue?