Hi. Today I took my MC8 out for a bus run down I-75 south, from Lexington, Ky to Williamsburg Ky and back. Again the bus ran flawlessly as it always has but at the turn around point and again when I got parked back in Lexington I checked my exhaust manifold temps. The bus seems to be a little weak on hills but maybe my expectations are out of line. Also even at full throttle on a hill I never see any dark exhaust. About the most I think I see in my left mirror is maybe a little haziness but nothing of any substance.
I used my infrared thermometer and scanned the middle of the manifold on both sides. It read 270 or so on the curb side and 200 on the street side. I got the same reading both times, mid trip and once back home. Both checks were made with the engine idling. I am concerned of the difference between the two manifolds and it makes me think once bank of cylinders are doing more work than the other. Maybe the rack needs adjusting?
My bus is 86' MC8, 8V71 natural, with HT740.
I appreciate any feedback.
Russell