Firstfives.org

Thanks for the hints, so far.
Have checked the AFM. Flap moves smoothly. Smooth/even driving response, just no power.
Cat. Is there a way to check this? What should the back pressure be? Assuming I can use the O2 sensor port to add a pressure gauge. Or is there a simpler approach?
Rich

Hi folks, I have a 81 528i manual, CA car (Completely stock) that ran great a year ago. It was reclaimed with the help of 2 other 528i donors and G-son's help. Now with next G-son, and here is the problem for you "detectives". It starts, runs and idles smoothly, but not much power. When we drive off ...