Open loop refers to engine running on limited fuel and ingnition strategys . Codes will only set if hard failure @ bad connection , no voltage etc. Closed loop , computer takes total control of fuel and ignition. Codes can set anytime sensor sees reading out of parameter. However,can have several drive concerns without tripping code.
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Today's Featured Article - The Tractor Parade: Story of a Case SC - by Bernie DeLon. On a early fall morning back in 1994, I opened the newspaper and happened to spy an article about a local antique tractor club having their annual show that weekend.
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