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Re: Turbo 5VZ... Random dead spot bucking/jerking while cruising
I'm not seeing any conflicting cell values that are jumping out in front of me, but I did notice something.
Perhaps running your O2 in voltage mode and creating a voltage/O2 table might work. From the installation instructions:
“Voltage” mode - The F/IC outputs a voltage, which is determined by the
corresponding cells in the “O2 Map”. In the “Voltage” mode, for an “O2 Map” cell
value of 2.5, the F/IC will output 2.5 volts. In “Voltage” mode, a cell value of 0
makes no change, NOT an output voltage of 0 volts.
“Fixed” mode - The F/IC outputs a square wave that alternates between the Bank
Hi voltage and the Bank Lo voltage. The Bank Hi voltage, Bank Lo voltage, and
square wave period are set in the O2 section of the setup window. The pulse
width is determined by the cell value in the “O2 Map”. For a Bank Hi of 2, and
Bank Lo of 1, a period of 200 ms, and a cell value of 50, the F/IC will output 2
volts for 50 ms, 1 volt for 150ms, 2 volts for 50 ms, etc.
“Percent” mode - The F/IC will measure the O2 voltage, then modify it by the
percentage value in the “O2 Map”. For a measured value of 1 volt, a period of
200ms, and a cell value of 20, the F/IC will measure 1 volt for 5ms, then output
1.2 volts for 195ms, then measure again for 5ms, etc.
“Offset” mode - The F/IC will measure the O2 voltage, and then modify it by the
offset value in the O2 map. For a measured value of .7 volts, a period of 200ms,
and a cell value of -.25, the F/IC will measure 0.7volts for 5ms, then output 0.45
volts for 195ms, then measure again for 5ms, etc
My 02' 2rz liked percent mode. My 01' 5vz likes voltage mode. You could possibly be using a mode that (somehow) freaks out the ECM. I'm just guessing, but if you can skew your O2 a different way, it may work -- wild guess. Other than that... TPS or wiring gremlins?