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mooney265 mooney265 is offline
Tinkering Pays!!
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Join Date: Sep 2008
Location: New Orleans
Posts: 1,365
Old School [I was told by my mechanic], is to have the car idling and warmed up. Then, depress the Air Metering Plate ever slightly. Take note as to the Engine RPM.

If RPM immediately momentarily goes up, then your car's idle mixture is a bit lean. If the rpm momentarily goes down, then it could have been right on, or a bit rich. Interpolate from there...

Like Jim said, I needed Wideband to be sure. My advice [to me and others] is to start with a set of CIS gauges and Wideband AFR. I know those have been the keys for me to be able to "dance the CIS dance..."

Good Luck!
LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 10-09-2014, 02:10 PM
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