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ever_green · 10-01-2012, 07:27 PM

i have been monitoring the Air to Fuel ratio for my impreza using scangauge 2. im using one of the official xgauge codes from scangauge's own website. The numbers reported seem ok if not too static. But AFR does not change under WOT below 3k rpm. example in 4th gear at about 2000rpm & 30mph under WOT the AFR stays in the 14.5s! (car doesn't go into open loop, it only enters open loop when engine is cold or if i climb over 4k rpm). if i flatout keep WOT and let the RPMs climb past 3k then AFR dips to 13s and eventually as low as 11 by redline. but not so under wot below 3k rpm. is this my car or is there something wrong with scangauge?

10-01-2012, 07:27 PM	#1 (permalink)
ever_green Master EcoModder Join Date: May 2011 Location: Toronto Posts: 264 gueff - '19 Mercedes Benz A250 4MATIC AMG 90 day: 30.55 mpg (US) Thanks: 8 Thanked 79 Times in 33 Posts	AFR not changing under WOT below 3k rpm i have been monitoring the Air to Fuel ratio for my impreza using scangauge 2. im using one of the official xgauge codes from scangauge's own website. The numbers reported seem ok if not too static. But AFR does not change under WOT below 3k rpm. example in 4th gear at about 2000rpm & 30mph under WOT the AFR stays in the 14.5s! (car doesn't go into open loop, it only enters open loop when engine is cold or if i climb over 4k rpm). if i flatout keep WOT and let the RPMs climb past 3k then AFR dips to 13s and eventually as low as 11 by redline. but not so under wot below 3k rpm. is this my car or is there something wrong with scangauge? __________________