96 chev Caprice, engine crank and vibrate

The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.

Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.

That would make sense but sounds a little on the expensive side. It would not be good to drive it too much this way as it will do damage to the catalytic Converter.

I wouldn't sell the car because you won't get much in that condition but I might get a second estimate from another shop and compare prices.

I don't know what your expecting from me. You asked for advice on your problem and got it. You don't plan on repairing this yourself so what what diagrams would you be looking for?

I don't charge at all. If you gave a voluntary donation, it went to the site to help keep it running. Nothing is mandatory. I am just here trying to help people in my spare time.

No problem. If there is anything specific you need to know, just ask.

Please don't post personal info. Everyone can see that. There is no required fee at all. Donations are voluntary. If you made one and want it back, just contact customer service and request a refund. No one is going to take more from you than you authorize.