open up the opti, cap and rotor had some corrsion clean it up. is that what is making the car miss and not start sometimes.

 

Could be. I would go ahead and replace both items.

 

It's probably the plugs making it hard to crank.

 

Helpful hint - Add a "signature" with basic info about your car, year, model, tranny, and any major mods. Not all years of the LT1 are the same, and the Opti is a good example.

The 93-94's are "no vented" and prone to corrosion from ozone buildup. That would cause the problems you are describing. Moisture buildup will contribute. 95-97 Optis are "vented" and you would need to check the condition of the vent system to make sure it is working correctly.