i have a 91 camaro rs with 305 tbi. My brother in law thought it would be cool to run off on my car the other day while i was sleeping at 630 in the morning to go on a beer run. i wake up and my car is gone so i borrowed a buddies car and went looking for him. After about an hour of looking i finaly found him on the side of the road. the car was dead no life at all not even the battery had juice. I towed it back to the house and replaced the ICM still wont crank. So i went a head and replaced the rotor now it cranks but shakes violently and backfires through the carb. I hope someone can help. ty