Duty Cycle
 

What is the recommended duty cycle for a 1991 560 SEL. I have mine set to 50%. However I have a hesistation on excelleration from a stop. Somewhat dangerous crossing a road. It started happening the day after I took it in to the shop to be adjusted and gases measured after I replaced my injectors. Is it to lean?
thanks
m

By the way before the adjustment at the shop she was set to a 70% Duty cycle. The car is at 6000 feet should I set it back or is there something else I am missing.

It should oscillate by about 10% (e.g. 45-55% ) when the engine is warmed up. If it's at a fixed reading of 50% at operating temperature you may have a bad O2 sensor. An oscillating reading of approx. 70% reading indicates a slightly lean mixture, but still within the acceptable range. Does it oscillate?

weird
 

When set to 50% it really does not oscillate at all, but when set to 70 it actually fluctuates alot from 60's to 80's. The guys at the indy shop said a 70% was rich not lean?
I also am putting a new chain in in the morning as I have 10 degrees of stretch.
m

70% is rich compared to 90%, but it's leaner than 50%!