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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by RarlyL8 View Post
Re-install the O2 sensor and check your readings. The Lambda system cannot be simply unplugged as the frequency valve will have no reference point.
Brian, I must be missing something but I don't understand your comment. Like many, I run without the O2 sensor plugged in. Thus, with the lambda system in open-loop, the frequency valve simple defaults to a fixed duty cycle (50%?) since the computer is no longer getting a signal from the sensor, so the fixed duty cycle becomes a constant against which to tune around. My AFR's are really fairly predictable and consistent, plus or minus a few tenths depending on ambient and engine temperature.
Could you expand a bit on what you're referring to?
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 03-30-2013, 06:44 PM
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