I have 850s in the primary and secondary rails and it seems no matter how much fuel I remove my wideband reading wont change and the datalogger sees the values at least 2 points too low (WB reads 11.5, DL shows 9.5). The WB is a PLX and seemed to work fine before my engine went but now I think it may have problems.

My current INJ map at idle is:


P3&N2= 1.156
P3&N3=1.094
P3&N4=1.102

P4&N2=1.078
P4&N3=1.016
P4&N4=1.129

Base Map is:

P3&N2=.5
P3&N3=.556
P3&N4=.776

P4&N2=1.016
P4&N3=1.072
P4&N4=1.232

Should be I be getting AFRs in the mid 11s at idle w/those values? Is my WB working?

Thanks for the help.

 

Which PLX model? It doesn't sound like it's working right.

 

Your AUX input for the WB must not be set up correctly, bad connection, bad sensor?

My engine idles best around 12.8AFR with optimum manual idle timing control.
Idle timing and porting affects the best AFR.

As previous posted: if your WB has it's own readout, calibrate (aux poly) the DL readings to match it. Kyle and I have found about a .1 to .3 leaner reading by DLs than what the WB displays give.

I have the PLX M-300.

 

Do you have your datalogit and wb gauge wired at the same time??? Not sure if it'll work properly like that.

 

You need to cal the DL to the PLX output, and depending on what let go in the motor I would get a new sensor considering the plx has no re cal. function.

 

You do know that you have to reduce the lag on the primaries to lean out idle, just pulling fuel in the correction maps or the inj table won't do it. Try running less lag, even negative numbers, and see if your afrs rise at idle. Beware that this will reduce fuel everywhere ...

 

I didnt know that(?). Its at .04 right now, I will try that ASAP. Thanks

 

This worked, thank you .

For anyones future seaching I set it at -.33. It could probably go a little lower but not sure. I still have severe idle issues w/this setting so I will amend this thread if the value change helps.