I'm heading back to Street Flight in June for a reburn. I've been getting Rich CEL codes. Chris and I have discussed a few ideas, and I've probed many CEGers for ideas too. Thanks to all!

Here are the old plots:
Dyno plot

1) Is it normal for the A/F to fluctuate like it did? (Runs 24 & 27 did have slightly different tunings.)

Chris checked the O2s w/ an OBD-II scanner, and he said they seemed to be working properly.

2) Otherwise, do the A/F curves look about right for optimal power?

I'm prepping for a reburn, so I want everything to be in top working order. UIM/LIM gets cleaned tomorrow, along w/ (hopefully) some butterfly optimization.

With an optimized TB and optimized butterflies, I'm hoping to actually see 180+ . Wish me luck.


Derek Scion xB 5-spd Previous: 2000 Silver Frost SVT Please share the road with cyclists.