My 1997 Pontiac Firebird has been studdering on acceleration at operating

[A5phyx1at10n]

temperature. Don't know whats wrong? I've been taking extremely good care of my car and has all the general maintenance done regularly. The plugs, wires, fuel pump, fuel filter, egr, alternator, water pump and a few other things are all new within the last year and I still get a studder when I accelerate, BUT!!! It only happens when the engine is at 210 degrees (operating temp). This studder is not intergral, its sporadic. I had shops look at it but they can't figure it out. I'm flat out stuck and need some opinions on what may be wrong. The car is a 1997 Pontiac Firebird Trans Am Convertible. Any advice at this point would be AWESOME!!! Thanks!

 

[melsg5]

anybody check the fuel pressure regulator? Not sure what years have this ignition timing system but something called Optispark is known to cause problems.