Hello Nathan and everyone!

I have a 95 525i M50 that will not accelerate when going uphill. My check engine light is on and at one point would go out when driving above 40 MPH on flat land. I had codes pulled by a shop and it only showed a "sensor" error (forgive me I don't have my diagnostic paper from that shop nearby to give the specific code currently) and they suggested my O2 sensor was bad. I replaced it, but no change in the acceleration issue. I changed all my sparks and ignition coils, as well as the camshaft sensor. Still no change in acceleration on hills but it has improved in drivability overall. What else could be wrong?

Thanks in advance for your replies and expertise guys!