|
Issues | Warranty | Recalls / TSB Problems, issues, recalls, TSBs |
|
Thread Tools | Search this Thread |
06-03-2019, 10:25 AM | #1 |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Weird AFR and fuel trims P1170 P0171
Recently been having an issue with my fuel trims. They will usually be okay cruising but under load or on off throttle they will climb gradually up to the point I threw a P1170 P0171 with a gas smell in car. Also noticed when on off throttle while driving my AFR well briefly jump around from 13-15. It's almost like it's always hunting for the right ratio. Please help this is driving me nuts.
Sent from my SM-G950U using Tapatalk |
06-03-2019, 02:58 PM | #2 |
Professional Auto Fixer
Join Date: May 2019
Drives: 2016 Oceanic FR-S as Designed
Location: Oregon
Posts: 123
Thanks: 41
Thanked 70 Times in 46 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Any recent work done? I'd look jnto airflow meter or a/f sensor first. If your scanner can see those PIDs, check against specifications. Make sure all intake piping is secure, no vac lines disconnected.
__________________
Work Hard. Play Hard.
2016 Oceanic |
The Following User Says Thank You to ActionMaxon For This Useful Post: | Tonypepatone (06-04-2019) |
06-03-2019, 06:50 PM | #3 | |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Sent from my SM-G950U using Tapatalk |
|
06-03-2019, 09:30 PM | #4 |
Simply Forgotus
Join Date: Sep 2013
Drives: 2014 Supercharged SSM BRZ Limited
Location: Baltimore, MD
Posts: 916
Thanks: 735
Thanked 912 Times in 454 Posts
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
|
Any other mods, like a header? I would start looking for vacuum leaks and/or exhaust leaks particularly in the exhaust manifold area. I had p0171's due to a vacuum leak, the ECU interpreted it as being too lean and kept dumping more fuel in causing the raw fuel smell.
|
The Following User Says Thank You to BirdTRD For This Useful Post: | Tonypepatone (06-04-2019) |
06-03-2019, 09:48 PM | #5 | |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Sent from my SM-G950U using Tapatalk |
|
06-03-2019, 11:05 PM | #6 |
Professional Auto Fixer
Join Date: May 2019
Drives: 2016 Oceanic FR-S as Designed
Location: Oregon
Posts: 123
Thanks: 41
Thanked 70 Times in 46 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Most of the reference specs that I have access to involve the use of an oscilloscope. If you have one, I can get you some useful info. Otherwise, you'll have to search out info.
I also looked up the P0171 for a 2013, and it indicated that a thorough inspection of your intake plumbing is warranted. Wherever the intake tubing has those bendy bits you'll want to look to make sure there are no breaks. If the intake tubing is cracking, you could get intermittent unmetered air going into your engine. (Like in the case of on/off throttle where the engine is torqueing/moving slightly) If this is happening, you may get those erratic fuel trim readings, as well as a lean code. Go over those hoses really well with a bright flashlight looking for cracks/tears wherever it flexes.
__________________
Work Hard. Play Hard.
2016 Oceanic |
The Following User Says Thank You to ActionMaxon For This Useful Post: | Tonypepatone (06-04-2019) |
06-05-2019, 06:46 AM | #7 |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Okay so I'm pretty sure it's one of my injectors left side. The thing is absolutely filthy and don't think it's running properly.
Sent from my SM-G950U using Tapatalk |
06-05-2019, 02:30 PM | #8 |
Professional Auto Fixer
Join Date: May 2019
Drives: 2016 Oceanic FR-S as Designed
Location: Oregon
Posts: 123
Thanks: 41
Thanked 70 Times in 46 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Make sure the injector connector lock tab isn't broken. I've seen that before. Also happens on coils. Be careful removing. Replacement connectors are cheap if you find one broken.
Keep us posted Edit: (If lock tab was broke you'd probably have misfires too, which you didn't mention so that's less likely.
__________________
Work Hard. Play Hard.
2016 Oceanic Last edited by ActionMaxon; 06-05-2019 at 02:40 PM. Reason: Clarification, additional info |
The Following User Says Thank You to ActionMaxon For This Useful Post: | Tonypepatone (06-06-2019) |
06-05-2019, 04:49 PM | #9 |
Senior Member
Join Date: Jul 2018
Drives: 2014 Scion FR-S
Location: Sarasota, FL
Posts: 427
Thanks: 499
Thanked 276 Times in 178 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
You might be onto something with the injector, but you may wanna smoke test the intake connections first just to be 100% sure. If you're smelling fuel in the car that's the ecu trying to compensate for not getting enough fuel, therefore dumping a ton of it from the working injectors.
Remember, if you plan to replace then you should replace all 4. One brand new plus three with 98k miles doesn't make any sense.
__________________
|
The Following User Says Thank You to MCTeeJ For This Useful Post: | Tonypepatone (06-06-2019) |
06-06-2019, 12:24 PM | #10 |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Alright so got the injector on the way found a used one from a wrecked car here, also ordered spark plugs cause why not, they need to be replaced anyway. I did buy new clips and o rings, just in case should arrive this weekend and I'm gonna try to put them on next week after I get them tested just to make sure they are all running right. Thanks for the help guys, this should solve the issues but I'll let you all know how it goes good or bad.
Sent from my SM-G950U using Tapatalk |
06-13-2019, 11:50 AM | #11 |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
So got the spark plugs changed 6 hours later...I was exhausted didn't change anything, new injector didn't help so dropped it off at a reputable Subaru mechanic today he said it was bad bank 1 sensor which is I believe the afr sensor which comes in Monday. Hopefully this is it, I'll keep y'all updated next week.
Sent from my SM-G950U using Tapatalk |
06-13-2019, 04:15 PM | #12 |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Oh and he also mentioned it could be something blocking the cat. Has anyone had one go bad yet?
Figured if it is it's a good excuse to get a new header Sent from my SM-G950U using Tapatalk |
06-13-2019, 04:58 PM | #13 |
Senior Member
Join Date: Dec 2015
Drives: Track preped NA FRS
Location: Montreal, Canada
Posts: 987
Thanks: 1,056
Thanked 680 Times in 405 Posts
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
|
There was a buddy of mine who had tons of issues with his car, fuel and air related most of the time. After months of debugging, it turned out to be a clogged cat. He was running catless header but the front-pipe cat just destroyed itself and blocked most of the way. Very much worth a shot for you to inspect that, front-pipe isnt hard or long to remove.
|
The Following 3 Users Say Thank You to Icecreamtruk For This Useful Post: |
06-17-2019, 06:17 PM | #14 |
Member
Join Date: Apr 2015
Drives: 2013 ScionFRS
Location: Kansas City MO
Posts: 33
Thanks: 20
Thanked 9 Times in 8 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Also worth mentioning when I changed the spark plugs their was some oil inside and on the little electrical connectors for the coil packs. None on the spark plugs or inside the ignition coil itself. Should I give those a good cleaning with electrical cleaner?
Sent from my SM-G950U using Tapatalk |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Check engine codes P0171, P1170, C1201, C1231, and c1241 HELP | Crystalwhitebrzsti | Issues | Warranty | Recalls / TSB | 10 | 05-30-2019 06:45 AM |
Odd idle and P0171 and P1170 codes | dave- | Engine, Exhaust, Transmission | 0 | 09-26-2018 11:05 PM |
Throwing P0171 and P1170 codes | B-R-Z | Software Tuning | 39 | 01-27-2018 09:56 PM |
Lean Code/Weird fuel trims | jwvand02 | Issues | Warranty | Recalls / TSB | 18 | 03-24-2017 02:06 PM |
Fuel trims are f***** up | tskaohu | Software Tuning | 11 | 02-23-2016 09:53 PM |