07-22-2011, 03:12 PM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Reading spark plugs will only give you an average indication of A/F ratio.
Lean at one end and rich at the other (or vice versa) may give a good reading.
You need a fast operating wide band O2 sensor gauge with data logging capability to pick accelerator pump accuracy (rich/lean), idle circuit/progression/main circuit overlaps etc.
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Gary
Gold Certified Holden Technician
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