I have a 1995 Chevy Caprice and sometimes it 'hesitates' a little,especially on acceleration. Yesterday it did it again after I left the gas station,it's a Sunoco station I visit regularly. Perhaps there was something like water in the gas or something. I had a fuel pump replacement a year or two ago but I wonder if they could go bad that fast. I forget sometimes to keep the tank at least 1/4 as recommended so as not to damage the pump,but I wonder now if there might be some damage to it.
At the same time,when I turned on my a/c the car also started to sound rough. I don't know if something else is starting to break down or what.

Have your throttle position sensor checked and/or replaced. That should take care of the tip-in hesitation during acceleration. However, you may want to have the fuel pressure and fuel volume tested to make certain fuel delivery isn't the issue.

Regarding the A/C noise, you may be in the early stages of compressor failure. Have that checked by your local mechanic so as to not cause contamination to the remainder of the A/C system.

I hope this helps.

Installing new spark plugs (ACDelco only) may help eliminate the hesitation. I recommend replacing platinum plugs at least every 50,000 miles. If the plug wires and fuel filter have never been changed, I would replace them.

Installing new spark plugs (ACDelco only) may help eliminate the hesitation. I recommend replacing platinum plugs at least every 50,000 miles. If the plug wires and fuel filter have never been changed, I would replace them.

That's another thing in itself,tuneups are expensive for mine because they have to take out the water pump and things to get to the wires and distributor.