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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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Yeah, duty-cycle is the on-time (spray) compared to the off-time of the injector. Some scan tools measure the injector on-time in milliseconds (ms). General on-time at idle is 2-3 ms and as the rpm or load goes up, the injector on-time increases also.
Domestic Chryslers use the speed/density EFI type system.

http://www.carcraft.com/techarticles/electronic_fuel_injection/

http://en.wikipedia.org/wiki/Fuel_injection
 
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