afr

Looking for help diagnosing a weird issue with wandering AFR under light throttle. There is not an obvious vacuum leak causing this had already done boost leak test to 25psi. Started Happening after changing downpipe, catback and BOV. Year/Make/Model: 2010 Speed 3 Mileage: Body:148,000...

Hey guys, I am new here, so I apologize if I'm not doing this right... So, a while ago, I was driving around and punched the throttle, car overboosted to 30psi and hit fuel cut, tried slowly easing into boost and heard the EWG open a little bit, but not nearly as much as normal, the next pull...

I have a Gen 1 speed3, it runs great. I noticed though that my AFR today was 14.26-14.41 on cruising. I thought it was closer to 14.7 before… mods: 3” turbo xs catless downpipe and testpipe 3” custom aluminum modified mazdaspeed brand intake Autotech high pressure fuel internals. Damond...

I've been using the website for a bit, has been very useful to read other's experiences to give me ideas on where to start. I have recently put a lot of work into my 1st gen speed 3. The largest item was swapping my factor replacement turbo to a BNR v3 Stage 3 turbocharger and an accessport from...

so this is my first post, If u want to go straight to what my issue is skip the details next ill put troubleshooting in bold I bought my 2013 speed 3 in may 2022 at 134xxxkm and its now just over 140xxxkm. since buying it I've learnt that it has a gen 1 engine, engine is "fine" (comp...

Hi all! Today I threw a stage 1 cobb ots map on my 2009 Speed3. I first noticed that it felt way faster when pulling (Yay!), but soon after I saw that I was only making low 13's psi boost. I also saw that my AFR was different on WOT, staying around 11.76. There was a bit of Knock retard in one...

Ive been trying to chase a fueling issue the past couple weeks, seemingly to no resolution. my longterm fuel trims are sitting at -20.44, give or take about 2% either way. I was watching my AFR otw to work this morning, and it dipped down into the 9.0/1 range, and i let off as soon as i saw...

This is my first post here so I apologize if I mess anything up! (For reference, currently have a jbr stage 2 powerpath intake/turbo inlet, turbosmart 50/50 set to full recirc, corksport hpfp internals, jbr rear motor mount, and a catback exhaust on the car. During the time of the first 3 logs...

Hello, Running a self-tuned base map with a 33% E85 and 91 premium mix. I have advanced ignition timing 4* so far over a couple logs, and no KR logged under any condition. I used an e85 calculator to change fuel gravity for my mix, and have increased fueling tables up to my max rich power...

My 2007 Mazdaspeed3 has been running very rich. You can drive it but I avoid to right now as it will stall at idle sometimes. My AFRs at Idle will be in the 9-12 range most of the time. Cruising is alright, except when you let off the throttle, fuel continues to enter the engine creating pops...

Currently running a v3 AP in my 08MS3GT with 81k miles. Trying out up to STG 1 93 tune until I get HPFP upgrade within the month. HPFP actual pressure isn't dropping below 1600 ever at WOT. However actual AFR is running at a 12.2-12.35 with boost at WOT. Stock intake system and everything. I...