My 1994 Cadillac Seville had developed a misfire / hesitation when accelerating.

Pull codes:

http://www.cadillacforums.com/forums/cadillac-tech-tips/55172-how-pull-codes-got-codes-warning.html

How old are the plugs & wires?

Thanks for the info on the codes.Thats a big help.

Does this sound familiar?
http://www.cadillacforums.com/forums/northstar-performance-technical-discussion/25119-stutter-engine-trans.html

no codes.... filled it with fresh premium fuel.. added lil bit of octane boster as well. Changed the plugs and it does run a bit better but still has studder / misfire from idle - as long as I ease on throtle. If I take off quick it is smooth. slight rough idle

Have you replaced the wires?

nope...
but wouldn't I get some codes if it was missing from an elect problem? I have it going in for new front brakes and new fuel filter on thursday. See what it does after new filter.

You might get a P0300 DTC (misfire detected) if it is bad enough. Fuel filter is not your problem. I'd bet on it. Did you read the link I provided? I'd almost put money on the wires.

dropped the car at the garage this morning and told the mechanic to fix the stupid thing.

I did not get any codes for my awful hesitation and shuddering, but when I did plugs and wires at the same time the problem disappeared. good luck!

dropped the car at the garage this morning and told the mechanic to fix the stupid thing.

Plugs and wires worked for me.