05-21-2013, 05:43 PM
Join Date: Oct 2008
My Ride: E60 M5 & Stg3 AudiS4
11.5 afr is running rather rich. 14.7 is ideal and perfect. His numbers are fine and afr bounces all over the place when idle, pressing the gas slightly or slamming the gas. When in full open throttle if it reads to about 14 that's perfect. I do agree he should get some colder plugs though to see if it resolves the misfire issue.
Originally Posted by BobbyC
Oops, my bad. You mentioned AFR's being 12,13,14 across the board. Please tell me that was NOT under boost. Assuming that your fuel system is up to par, I would start with one, maybe two steps colder on the plugs and gap them down. If 93 is available in your area, see if you can tune it safely w/out meth. 11.5 is as high as I would like to see on a street car for afr's, tuned safely.
BMW 2006 M5 - REALLY LOUD
BMW 2007 335i - ST GT35R
Audi S4 2000 Stage 3 - Dat turbo spool
BMW 2000 3-series
Because race car SOLD
Maserati 2004 M128 GT
- HREs/tint/straight piped SOLD
BMW 2006 M3 - stock - SOLD
Last edited by MalibuMafiaV; 05-21-2013 at 05:44 PM.