i am looking for help on where to start with my Z. It is an 86 turbo, with about 85,000 miles. Lately it has been hard to start. taking a few tries before it will start. I had it out yesterday for a drive and it was missing and hesitating very badly under normal driving conditions, and would work better with higher revs. i thought that I might not make it home! I noticed it was worse after the car warmed up a little. I also noticed while stopped at traffic lights, the car would shake while sitting still. Any thoughts on where to start, and what the problem might be, would be greatly appreciated.