Re: How to know when broken in? Fuel ratios?
I used to de-carbon old carburetor equipped cars with a shot of brake fluid poured down the throat of the carb while the car was running. Made one **** of a sweet smelling smoke screen. Had to make sure the car didn't have a catalytic converter as you could hear the carbon 'tinkling' down the exhaust pipe.
Probably illegal, but it sure cured driveability problems!
You're never lost until you run outa gas.