Finally got my 86 spider running pretty well. Today I go out to crank it and it starts but the yellow fan light on the dash won't go out. Then i try to give it some gas and the pedal feels funny and doesn't do anything. I pop the hood and am able to rev the motor by hand. Sit back in the car and try the pedal and it finally revs really high and sticks. I shut the car off. I did install a new stereo last night. Could that have caused a problem? Any ideas of what to look for or what caused this?