AFR on my RR printout...

[JIMYU]

I got this air fuel ratio graph from my RR...what does it actually mean? and does mine look ok?

cheers, jim

 

[PhilW]

Am i right in sayin 14.0 at redline and stayin around 13 for the majority of the run? And 15 for first run?

A bit lean innit? or am i reading this wrong?

Was it a probe thing up the tailpipe?

 

[JIMYU]

yeah sorry the pic is a bit small isn't it..

1st run (blue line) stays at about 14 and ends at 15.

2nd run (red line) stays at about 13.5 and ends at 14.

yes it was probe thing up the tailpipe (lol)

So does it look a bit lean to you? any ideas why that might be?

Yesteday i noticed the 1st coilpack was raised slightly...I pushed it back down and the car seems to be running slightly better (or it might just be in my head tbh!) Not sure if that could be linked.

 

[PhilW]

Probably not a true readout if the probe was up the tail pipe or wasnt inb correctly.

Didnt you get like 250bhp? No lean codes up on vag com? Wouldnt worry about it really.

 

[f1btn]

14.7 is stoichametric

 

[JIMYU]

stoichametric....?

I don't have vagcom but everything seems ok and yeah got 250bhp and 279 ftlbs so suppose nothing to worry about.

thanks

 

[PhilW]

Stoichametric is a condition where there is a perfect balance between oxygen molecules and the various hydrogen and carbon based molecules in petroleum.

Originally Posted by max_torque
AFR Lambda Comment
17.5 1.209 Very lean (getting towards lean misfire region)
16 1.106 Lean (no misfires but not maximum torque, fuel economy)
14.47 1.000 Stoich (catalyst will only work here + or - 0.5%)
12.9 0.891 LBT (lean best torque)
10.5 0.726 Excessively rich (Maybe required for component protection)

 

[f1btn]

stoichametric....?

I don't have vagcom but everything seems ok and yeah got 250bhp and 279 ftlbs so suppose nothing to worry about.

thanks

perfect mixture!!!!!