are these good numbers for autotap? how do i check the o2 that say .870 to .900 and s

[SLOWBRAEATER]

some of you with autotap say your o2 are at .870, there are several options for checking o2 sensors, what exactly des it say so i can check the option that has the numbers that say about .870 to .900 and so on?

here are some things i checked i clisked on advanced and the numbers didnt fluctuate as much

o2 sensor bank 1 sensor 1= -28.9%
o2 sensor bank 1 sensor 1 mv= 445
o2 sensor bank 2 sensor 1= -42.2% and at one time went all the way up to -58.6% when it wasnt on advanced
02 sensor bank 2 sensor 1= 3.56 mv
injector pulse was around 3.58 and went way u to 4.07 at one time
air fuel ratio 14:7.1 highest was 14.8 i think
all this was at idle i hope this makes sense, i am not sure what exactly to monitor all help is appreciated

[John_D.]

The millivolts are the ones you want. 445 mv would be .445 volts. Sensor 1 on banks 1 & 2.

The reported a/f ratio is pretty useless. Best I can figure, it is the target a/f ratio the pcm is going to try to hit. But the o2 sensors tell you what is actually happening.

These numbers will constantly fluctuate at idle, and at part-throttle. The pcm is intentionally sweeping back and forth across the range, like when you balance a baseball bat on end in the palm of your hand, you are constantly moving it back and forth to keep it centered...

The WOT numbers are the ones you care about.

I usually log RPM, MPH, one or both o2 sensors (if only one, I log the one that tends to run the leanest), pulse width of one injector, and knock retard. Sometimes I will log the tps sensor reading, just to see when I got on and off the throttle for sure. You can tell when the rpms and mph start climbing though, is when you got on it... [img]smile.gif[/img]

The pulse width of the injector matters most at wot at the upper end of the rpm band. The pcm could hold the injector open for 24ms at 3000 rpms and still have plenty of recovery time. But 20ms at 6000 rpms means the injector has no recovery time and is open constantly. Unless you have added a significant amount of power, this probably won't be an issue. There is a table in the tech database that shows the duty cycle at different rpms, for a given pulse width. The ideal is not to exceed about 85% duty cycle or so.