1994 pontiac grand am se 2.3

What is your question?

ive replaced all sensors, vacuum hoses,cleaned throttle body,replaced all plugs and wires and replaced fuel filter also just took fuel rail off and cleaned injectors but car still losses power going up hills and car idles a little rough at start whats the issues

What makes this problem better or worse?

going up hills

How long has your 1994 Pontiac Grand Am had this problem?

almost 3 weeks just bought the car