Why does my vehicle dies out over 2150 RPM?

I have a 1994 Oldmobile Silhouette 3800. We have recently changed the fuel filter, air filter, oil filter, the oil, the antifreeze, and ran fuel injector cleaner and complete fuel system treatment (both Valvoline SynPower). This problem does not happen all the time, but the vehicle will die over an approximate 2150RPMs. It is impossible to drive unless you take about a whole minute to go from 0 to 60. This very slow acceleration is very annoying to drive with an dangerous to drive with on the highway or when crossing the highway. We have assumed it was moisture in the gasoline, but even after adding gas treatment to the tank and going through another tank of different gasoline, the problem still persists. Even at optimal temperatures (140-180 degrees) the engine still dies over 2150RPM. The check engine light is NOT on either. Any suggestions at all on what the problem may be and what a solution may be would be greatly appreciated.Why does my vehicle dies out over 2150 RPM?If it runs ok at half throttle or less but starts to bog down from half to full throttle the most likely problem is the fuel pump but you could have a clogged fuel filter
Why does my vehicle dies out over 2150 RPM?
my car is constantly above that i thought u were lying but if it takes a min.
Why does my vehicle dies out over 2150 RPM?
tune it up. wires and plugs, cap and rotor...if that doesnt work try a new coi[
Check the timing it might be off or going off that sometime make it do that
Your computer may be in safe mode. I would have it tested by an authorized dealer