Lupe, he has a '95. The secondaries are vacuum actuated, no IMRC to worry about.
I would suggest checking the vac tubes coming from under the intake manifold & inspecting the tubes, fittings, and valves for breaks, cracks, & leaks. Your secondaries may be stuck open if you have a vac leak. If this is the case, your car will be quite boggy below 4000 rpm, but act near normal above 4000 rpm. That what's happening to you??