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Old 01-21-2019, 01:35 PM   #68
Wgesnerjr
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Join Date: Jun 2015
Location: Atlanta, GA.
Posts: 737
Re: Stumbling after start up

Thanks. Excitement has died down now.

The pics are screenshots of the Torque Lite app on my phone. It connects to a bluetooth OBD plug in the ALDL connector under the dash.

It it showing both O2 sensors. Both left and right banks of the engine. The higher the green line, the richer the mixture. Lower the leaner. The far right is the current measurement. It will slowly move left and give a line as it goes. So imagine everything slowly moving left. (Sorry, cant post a video) the whole screen is about 15 to 20 seconds of time.

This really helped me figure out where it was running rich and under which conditions. The green line would max out high on bank 2 during start up until the exhaust warmed the O2 sensor, then drop down and start alternating up and down as the PCM controlled mixture. Bank 1 would alternate like normal.

The app is customizable with different readings so I could see open vs. Closed loop, temperature, MAF, etc.
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Jay Gesner
Atlanta, GA
1985 C10 Long Bed 4X2
LS 5.3, 4L60E
Father/Daughter Project

Last edited by Wgesnerjr; 01-21-2019 at 08:23 PM.
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