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1LowToy · 02-20-2011, 01:19 AM

The O2 sensor produces a small amount of voltage which varies to tell the computer, to tell the carburator to richen up or lean out depending on the voltage. Sorry I can remember which way is richer or leaner. As I remember there are two wires going into the carb and you checked the voltage, or dwell reading there for the duty cycle. I happen to have an 80 I6 but it's not a feedback carb.

02-20-2011, 01:19 AM	#16
1LowToy Registered User Join Date: Nov 2009 Location: Sonora California Posts: 860	Re: Hard shut off on 4.1l engine The O2 sensor produces a small amount of voltage which varies to tell the computer, to tell the carburator to richen up or lean out depending on the voltage. Sorry I can remember which way is richer or leaner. As I remember there are two wires going into the carb and you checked the voltage, or dwell reading there for the duty cycle. I happen to have an 80 I6 but it's not a feedback carb.