# My mpgs are suckingggg help! **URL:** \ **Category:** Shift518 Automotive\ **Created:** [April 18, 2012, 8:49am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445 "2012-04-18T08:49:02Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![KrazyKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/krazykid/32/6371_2.png) [@KrazyKid](https://forums.speedlife.net/u/KrazyKid)\ **Post date:** [April 18, 2012, 11:06am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/21 "2012-04-18T11:06:42Z")
> [@Hack Admin password in XP professional?](https://forums.speedlife.net/t/hack-admin-password-in-xp-professional/49196/6): > > If she can get it tuned with an ECU reflash, the tuner should be able to make it so her CEL is no longer on. At least any competent Subaru tuner should be able to. I recommend EFI Logics in CT. > > Sandwich for payment or my help would be accepted. Do you know if the cat code will play with tuning at all? In my mind I would assume it would try to lean it out, not send so much fuel through it and piss off all the tree huggers with un-catalized unburnt fuel. If thats the case its the opposite of what we have going on here. Is the parking brake stuck on? LOL Sorry I had to play along a bit. :rofl ---
**Author:** ![underboosted](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/underboosted/32/6424_2.png) [@underboosted](https://forums.speedlife.net/u/underboosted)\ **Post date:** [April 18, 2012, 11:11am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/22 "2012-04-18T11:11:50Z")
You would think if it had a code for o2 though it would send enough fuel for it to be " safe". Which could knock down mpg’s. ---
**Author:** ![02rallyblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/02rallyblue/32/6756_2.png) [@02rallyblue](https://forums.speedlife.net/u/02rallyblue)\ **Post date:** [April 18, 2012, 11:13am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/23 "2012-04-18T11:13:27Z")
Talked to bono, I’m going to grab an o2 tomorrow and get r dun tomorrow night. And we cleaned the MAF ---
**Author:** ![KrazyKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/krazykid/32/6371_2.png) [@KrazyKid](https://forums.speedlife.net/u/KrazyKid)\ **Post date:** [April 18, 2012, 11:14am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/24 "2012-04-18T11:14:36Z")
yeah thats what I am thinking. O2 is reading too lean, (probably less voltage output from o2 telling the ecu whats up with the afrs) ((old plug, higher resistance from age, less voltage so it makes sense in my head)) and is requesting more fuel. If anyone has a VAG COM like cable, for subarus and will let me borrow it, I bet I can see the voltages from the o2’s and also see an adaptive fuel trim value to solidify our theories. ---
**Author:** ![KrazyKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/krazykid/32/6371_2.png) [@KrazyKid](https://forums.speedlife.net/u/KrazyKid)\ **Post date:** [April 18, 2012, 11:15am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/25 "2012-04-18T11:15:41Z")
> [@crazy burnout (lancaster)](https://forums.speedlife.net/t/crazy-burnout-lancaster/49191/12): > > Talked to bono, I’m going to grab an o2 tomorrow and get r dun tomorrow night. And we cleaned the MAF did bono’s innovate jobber he has there log MAF, O2 voltages, and adaptive fuel trims? I havent played with that thing yet ---
**Author:** ![02rallyblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/02rallyblue/32/6756_2.png) [@02rallyblue](https://forums.speedlife.net/u/02rallyblue)\ **Post date:** [April 18, 2012, 11:22am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/26 "2012-04-18T11:22:53Z")
Actually I dont know prob. It wouldn’t hook up this morning but I’ll look when I get out of work. And I’ll just send you pictures. I’ll be at the shop tomorrow night too so if u decide to stop by 🙂 ---
**Author:** ![jdaniels](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdaniels/32/6399_2.png) [@jdaniels](https://forums.speedlife.net/u/jdaniels)\ **Post date:** [April 18, 2012, 11:23am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/27 "2012-04-18T11:23:05Z")
change front o2 only. Try a sparkplug defouler on the rear o2. ---
**Author:** ![KrazyKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/krazykid/32/6371_2.png) [@KrazyKid](https://forums.speedlife.net/u/KrazyKid)\ **Post date:** [April 18, 2012, 11:47am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/28 "2012-04-18T11:47:32Z")
> [@HAPPY BIRTHDAY CHOKO!!!](https://forums.speedlife.net/t/happy-birthday-choko/49190/18): > > change front o2 only. Try a sparkplug defouler on the rear o2. thats what I ment. good catch, I had no cat on my mind when I said rear o2. FRONT or Upstream o2 when you go to get the sensor Amanda. ---
**Author:** ![usmc2801](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/usmc2801/32/6387_2.png) [@usmc2801](https://forums.speedlife.net/u/usmc2801)\ **Post date:** [April 18, 2012, 11:50am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/29 "2012-04-18T11:50:11Z")
> [@HAPPY BIRTHDAY CHOKO!!!](https://forums.speedlife.net/t/happy-birthday-choko/49190/18): > > change front o2 only. Try a sparkplug defouler on the rear o2. This! Worked on my Subaru for the cat code, I have a drilled out anti-fouler if you want it, the package comes with two and I only needed the one. LMK. ---
**Author:** ![JSEnclosures](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jsenclosures/32/6678_2.png) [@JSEnclosures](https://forums.speedlife.net/u/JSEnclosures)\ **Post date:** [April 18, 2012, 11:51am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/30 "2012-04-18T11:51:50Z")
i just picked up a 02 cel fix for my honda on ebay for under 20 bucks shipped. It spaced out the 02 sensor at a 90degree angle and doesn’t trigger my cel ---
**Author:** ![20wrx09](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/20wrx09/32/6532_2.png) [@20wrx09](https://forums.speedlife.net/u/20wrx09)\ **Post date:** [April 18, 2012, 4:22pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/31 "2012-04-18T16:22:30Z")
i told you before to get a t00n. hellooooo ---
**Author:** ![Neo187H](https://avatars.discourse-cdn.com/v4/letter/n/898d66/32.png) [@Neo187H](https://forums.speedlife.net/u/Neo187H)\ **Post date:** [April 18, 2012, 4:32pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/32 "2012-04-18T16:32:41Z")
Krazy, you’re getting way too in depth man! The CEL is on, car is in open loop so it won’t even be using learned fuel trims if you were to check. In open loop the car will run rich, like someone else said, it’s “safe mode”. ---
**Author:** ![Murrdog9000](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/murrdog9000/32/6391_2.png) [@Murrdog9000](https://forums.speedlife.net/u/Murrdog9000)\ **Post date:** [April 18, 2012, 4:38pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/33 "2012-04-18T16:38:33Z")
sell said subaru ---
**Author:** ![K20power](https://avatars.discourse-cdn.com/v4/letter/k/41988e/32.png) [@K20power](https://forums.speedlife.net/u/K20power)\ **Post date:** [April 18, 2012, 4:47pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/34 "2012-04-18T16:47:07Z")
![http://images.thecarconnection.com/med/wrx-sti-up-in-flames_100222506_m.jpg](http://images.thecarconnection.com/med/wrx-sti-up-in-flames_100222506_m.jpg) ---
**Author:** ![LKSi](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lksi/32/6316_2.png) [@LKSi](https://forums.speedlife.net/u/LKSi)\ **Post date:** [April 18, 2012, 4:57pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/35 "2012-04-18T16:57:08Z")
![http://img811.imageshack.us/img811/9808/travisf.jpg](http://img811.imageshack.us/img811/9808/travisf.jpg) ---
**Author:** ![91teg](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/91teg/32/6304_2.png) [@91teg](https://forums.speedlife.net/u/91teg)\ **Post date:** [April 18, 2012, 5:00pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/36 "2012-04-18T17:00:48Z")
:rofl ---
**Author:** ![Murrdog9000](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/murrdog9000/32/6391_2.png) [@Murrdog9000](https://forums.speedlife.net/u/Murrdog9000)\ **Post date:** [April 18, 2012, 5:05pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/37 "2012-04-18T17:05:49Z")
🤣rofl ---
**Author:** ![02rallyblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/02rallyblue/32/6756_2.png) [@02rallyblue](https://forums.speedlife.net/u/02rallyblue)\ **Post date:** [April 18, 2012, 5:07pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/38 "2012-04-18T17:07:24Z")
That’s what was used to pass Inspection for me. N then I started getting Terrible mpgs, so I had it removed and now my cel is back on and my mpgs are killing me ---
**Author:** ![jdaniels](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdaniels/32/6399_2.png) [@jdaniels](https://forums.speedlife.net/u/jdaniels)\ **Post date:** [April 18, 2012, 5:24pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/39 "2012-04-18T17:24:20Z")
You should have kept it. The downstream O2 sensor is used for catalytic converter efficiency, it wouldn’t affect anything else. Pre-O2 sensor exhaust leaks, fuel leaks, mass air flow sensor failing, tire pressure etc could all be the culprit. I’d bet that it’s just the upstream O2 sensor. ---
**Author:** ![GATVILLE](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gatville/32/6362_2.png) [@GATVILLE](https://forums.speedlife.net/u/GATVILLE)\ **Post date:** [April 18, 2012, 5:24pm UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/40 "2012-04-18T17:24:40Z")
soooo, pics??? [Previous page](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445.md?page=1) [Next page](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445.md?page=3)