My name is Dan and I own a 1991 Camaro. I dont post on here as much as I should but im on the site here and there to read about stuff happening. I havent driven the car much this summer which might have led to this. About 300 miles this year. But anyways here it is, I took the car out for a spin last week, Drove amazing. Stopped at a friends house and started her up and it was hesitant. The whole block is shaking and the car shakes a little as well because of this problem. Now I am no mechanic but here are my guesses.

Do you think there could be a fuel problem or maybe oil pump problem.
Also do you think maybe I have a bad cylinder, Maybe having a bad cylinder it is throwing the weight off and making it shake a bit. Any input would be greatly appreciated. The block is a stock 305 with 81k miles.

Thanks guys!!

 

sounds like it's developed a misfire, no way it's the oil pump. easiest assumption is one of the spark plug wires got onto the exhaust while it was driving amazing, then burned the wire. So go check the wires.