re: resistor inline with O2 sensor

[jkerouac@xxxxxxxxxxxxx]

The resistor inline with the Coolant Temperature sensor has other 
implications.  Temperature is one of several initial conditions upon 
which the mixture is then calculated to a set of base values. Jiggling 
it can prevent the ECU from running the engine in fully warm mode, while 
the system still strives for a 14.7 mixture.  It did not result in 
performance improvements.  Did give me smoky sputters at times when 
restarting a partially warm engine.

A resistor inline with the O2 sensor is a common mod that does work on 
pre-OBD cars.  It is a value used to make the fine adjustments in 
mixture above the initial mixture resulting from the baseline values 
The ECU can run the engine in fully warm mode, just thinks that it needs 
a richer mixture than it really does.  So you can get a mixture in the 
13.x range rather than the 14.7 which kees the EPA happy, but not max power.

This is a very layman's description of a complex process, not an exact 
technical description, but I hope it gives the idea why one resistor 
hack works, and I found that another one did not.

Btw has anyone tried this on the 4 O2 sensor OBDII?  I don't have the 
nerve to start from scratch on this one.

'jk

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