95 cavalier no power

My 95 with 2.2 starts and idles fine but when you take off down the road it lacks power (doggy) unless you kick it in the a!$, if you do that it takes off fine. After you drive it for a half hour or so you can feel it come out of it and it runs fine. I get a check engine light just before it straightens up and the cooling fan cycles on and off continually. Any suggestion? Thanks in advance..

My 95 with 2.2 starts and idles fine but when you take off down the road it lacks power (doggy) unless you kick it in the a!$, if you do that it takes off fine. After you drive it for a half hour or so you can feel it come out of it and it runs fine. I get a check engine light just before it straightens up and the cooling fan cycles on and off continually. Any suggestion? Thanks in advance..

Have you coded the car? It's sounds like a bad sensor with the fan and all. But if that is a seperate problem and just coincidence that it's happening simultaneously then I would guess at Fuel delivery problems. Possibly the fuel pump itself, maybe just the fuel filter or gummed up lines that need a cleaner run through them.