Very hard to start in cold weather. sluggish on take off and lose of acceleration. seems to idle fine. have to use starter fluid to crank it but only in winter. I put heat in with the gas

I think your mistaken. Your battery will lose cranking power as the temp drops. Warm battery may work just fine, untill it gets below freezing temps then the cranking amps are so low its sluggish. Buy a high cranking amp battery and you will be good as gold mate!

Have you checked the cooling sensor?

yea but not likely proably idle air control

sounds 2 things here. fuel pressure regulator or the idle air control valve. I an goingwith idle air control valve

I would need more info on the 96:
when you say struggles to start do you mean it cranks for a long period of time or does it sound weak when cranking.

On the 94:
It very much sounds like the idle control motor. Usually if you let the vehicle warm up in place you can avoid this. take the idle air control off and see if there is a lot of carbon build up and clean carefully.
Most often I opt for replacing the idle control motor.

Remember if this helps, please leave feedback and vote. Thank you and good luck.

You need to replace your starter. This is an old problem with GM starters, the armature gets older and then starts to swell when it gets warm.

That would be your coolant temp sensor it makes the car really hard to start in the cold and has poor acceleration and idle during warmup.

usally this goes away after the motor is hot

CHECK THE COLD START ENRICHMENT VALVE AND OR THE IDLE CONTROL VALVE. I AM ASSUMING THAT YOUR VEHICLE IS FUEL INJECTED. ONE OF THOSE HAVE GONE BAD.

Have a mechanic take a look at your throttle position sensor and engine idle sensor. Make him manually adjust them as opposed to just putting in new ones. It may require that you have to have a higher idle than normal. Your underlying cause is going to be that I am sure you have a lot of miles on your engine.

This happened to my 2001 Regal... There is a factory recall on the Catalytic Converter going bad. I had mine replaced with the recall and haven't had a problem since