afr

Hey ya'll, when I got into work and parked up in this South Florida heat I noticed her making a little shimmy and reached 15.0 before dropping back down, and then it kinda continued. Is this somewhat normal in a 2019? I've only owned a 2016 previously with the Gen 2

Hi guys i have a problem with my AFR at idle , the data usually fluctuates between 14.7 and 20 is usually corrected but fails again randomly , as a mod i have an edelbrock supercharger 2300 Tvs

What's up guys, I recently installed a catless exaust system and of course my CEL came on. It's throwing the expected codes for the bank 1 and 2 o2 sensors and also a code for emission system leak detected. I haven't gotten it tuned yet. My only concern as of now until I get it tuned is my AFR...

Hello, 2017 Mustang GT. Mods consist of: Roush CAI (tune required, ventrili tube removed), Corsa Extreme Catback, Catless long tubes, 91 octane tune from SCT. And its autotragic. My car will accelerate just fine and have no problem as long as I am accelerating. It's just whenever I am...

Recently got long tube headers installed on my 2013 GT, have the front o2 sensors connected properly but only one is connected by an extension the other one could fit without any extensions. I’m also running open headers currently as I haven’t been able to find a shop to get my exhaust put back...

I just recently installed a Procharger d1sc stage two kit on my 16' GT. Before install, everything was running perfect (i was running a FBO setup). My prior tune was done with Lund so I decided to use them again for this setup. Before the first startup after the install, I obviously loaded up my...

Trying to get a better understanding of AFR and lambda. New to this Lambda thing. Running a Lund flexfuel tune with 93 pump gas and the alch% learned to 9.8% so it looks good. Lambda stays .99-1.01 at idle and stays at .85 at WOT so it seems to be great. My question is: as long as lambda stays...

I've been using 93 pump gas since I got the tune and initially AFR at idle was 13.5-13.8, and 11.4 or so at WOT. Now it is at 12.7 at idle and 10.4 at WOT. Still using 93 oct pump gas and alcohol % is showing 32%. Anybody else get this? What'd you do? Edit: Solution on page 2.

What are the possible consequences of running a downpipe without a tune? (other than the secondary o2 deficiency code and the pvc smoking issue) Could a downpipe cause unnecessary wear on the turbo, sensors, or engine? Would boost creeping/over boost or maybe even running lean be a possible issue?