P0507 2006 wrx

EvoZero · 10-12-2021, 01:30 AM

I have a 2006 wrx with IAG stage 3 block. I was tuned on 91/E85 flex and the car ran great. FP red, TOMEI UEL, speed density, fmic, tgv delete, Cobb 1300cc injectors, dw300 Rewired. Recently the code came on for high idle and it's been idling around 1100-1250 rpm's. I changed the front o2 sensor and have boost leaked checked the car. My tuner has no idea what's happening and I do not either. What should I start with? Afr at idle is 13.9-14.3 on my aem uego. When I get into boost, I see it go lean and then rich, when cruising it'll dip into the 10's when I get off the gas.

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Unabomber · 10-12-2021, 01:46 PM

The #1 cause of wonky idle in a Subaru: https://forums.nasioc.com/forums/sho...d.php?t=781242

Your tuner should have known this and I feel sad that he does not.

EvoZero · 10-12-2021, 09:51 PM

Quote:

Originally Posted by Unabomber

The #1 cause of wonky idle in a Subaru: https://forums.nasioc.com/forums/sho...d.php?t=781242

Your tuner should have known this and I feel sad that he does not.

Car is drive by wire. I changed plugs, and pcv valve today, same thing. When I changed plugs they were wet. Tuner claims my car looks fine and most likely mechanical. While coming to stop signs the idle with drop and hold at normal 950-1000, after sitting at a stop sign it'll rise.I've checked all connections and am stumped why this would happen all of a sudden.

BlackFighter · 10-13-2021, 09:53 AM

Do you have your ac running when this happens?

xtremewlr · 10-13-2021, 12:18 PM

Quote:

Originally Posted by Unabomber

The #1 cause of wonky idle in a Subaru: https://forums.nasioc.com/forums/sho...d.php?t=781242

Your tuner should have known this and I feel sad that he does not.

Quote:

Originally Posted by EvoZero

Car is drive by wire. I changed plugs, and pcv valve today, same thing. When I changed plugs they were wet. Tuner claims my car looks fine and most likely mechanical. While coming to stop signs the idle with drop and hold at normal 950-1000, after sitting at a stop sign it'll rise.I've checked all connections and am stumped why this would happen all of a sudden.

Correct, 2006 WRX or STi doesn't have the idle air control valve to worry about. It uses a MAP sensor instead.

My 06 STi does something similar, with the idle dipping when I come to a stop light. Especially noticeable with the AC running as @BlackFighter has asked. I do not have any codes otherwise.

I'm curious if a failing or dirty MAP sensor could cause this issue? Reading @Unabomber's link, this post here leads me to think that a faulty or dirty MAP sensor could be a possible cause for the problem.

https://forums.nasioc.com/forums/sho...&postcount=530

Also be sure to check for vacuum leaks. They are notoriously hard to find. I just replaced all the rubber vacuum lines that I could find with silicone lines.

K3rm1tth3fr0g · 10-13-2021, 02:11 PM

I love when Ron comes in, makes his trademark snarky comment, only to be completely wrong LOL.

Just like when he came onto my post discussing turbos only to accost me for comparing dissimilar turbos, when the specific model he brought up I hadn't even mentioned in the post...

Gotta love forums man.

StarkWRX · 10-13-2021, 03:00 PM

Do you have a WBO2 sensor/gauge installed? And if so, does it coincide with the front O2 sensor?

EvoZero · 10-13-2021, 05:36 PM

Quote:

Originally Posted by StarkWRX

Do you have a WBO2 sensor/gauge installed? And if so, does it coincide with the front O2 sensor?

To everyone, AC is off, lights are off. It’s a new alternator, new battery, voltage 14-14.4v. Map sensor and build have less than 2000 miles on it. Wideband is connected to read in accessport, I haven’t checked to see front o2 to match but the front o2 is brand new installed a few days ago.

EvoZero · 10-15-2021, 02:03 PM

Bump, front o2 sensor reads the same as my wideband during warm up and idle.

EvoZero · 10-21-2021, 02:35 AM

I am still looking for a solution. Not sure what else to do.

xtremewlr · 10-21-2021, 11:32 AM

I'm thinking you should seek out a different tuner. I agree with Unabomber in that your tuner should know what to look for or how to troubleshoot this. Your statement that he is at a loss as to what to do leads me to think he is rather inexperienced, at least with Subies.

EvoZero · 10-21-2021, 01:17 PM

Quote:

Originally Posted by xtremewlr

I'm thinking you should seek out a different tuner. I agree with Unabomber in that your tuner should know what to look for or how to troubleshoot this. Your statement that he is at a loss as to what to do leads me to think he is rather inexperienced, at least with Subies.

I’m tuned by ShinjiTuned. All the reviews said he’s a great tuner which is why I chose him at the time.

xtremewlr · 10-21-2021, 04:27 PM

Quote:

Originally Posted by EvoZero

I’m tuned by ShinjiTuned. All the reviews said he’s a great tuner which is why I chose him at the time.

Maybe so, I have no experience with ShinjiTuned but I kinda feel that if they are supposed to be that good, they should be able to determine what you should be looking for via logs that you send them. I don't know if they use multiple tuners or if it's just one guy. I feel like the logs should be able to point you in the direction to start looking tho and your tuner should be able to help you decipher them.

EvoZero · 10-21-2021, 08:28 PM

Quote:

Originally Posted by xtremewlr

Maybe so, I have no experience with ShinjiTuned but I kinda feel that if they are supposed to be that good, they should be able to determine what you should be looking for via logs that you send them. I don't know if they use multiple tuners or if it's just one guy. I feel like the logs should be able to point you in the direction to start looking tho and your tuner should be able to help you decipher them.

I’m literally just trying to drive the car, thinking of parting it at this point.

K3rm1tth3fr0g · 10-21-2021, 10:26 PM

Quote:

Originally Posted by EvoZero

I’m literally just trying to drive the car, thinking of parting it at this point.

Don't part out the car. Finding intake and boost leaks and issues like this over E tuning is extremely difficult.

This is why I don't like E tuning. I suggest you find a good speciality tuning shop that is comfortable diagnosing Subarus in your area, and letting them have a crack at the car.

Good luck.

EvoZero · 10-22-2021, 05:04 AM

Quote:

Originally Posted by K3rm1tth3fr0g

Don't part out the car. Finding intake and boost leaks and issues like this over E tuning is extremely difficult.

This is why I don't like E tuning. I suggest you find a good speciality tuning shop that is comfortable diagnosing Subarus in your area, and letting them have a crack at the car.

Good luck.

Thanks, should’ve bought once, cried once lol.

EvoZero · 10-23-2021, 12:31 AM

Update,

Pumped 91 Oct to see if things would change, same afr same idle.

FAFWrx · 10-25-2021, 09:13 PM

Did you remove your TB and clean it?

EvoZero · 10-26-2021, 04:18 PM

Quote:

Originally Posted by FAFWrx

Did you remove your TB and clean it?

Did that and I Fuel Induction cleaned the motor at work. I pumped 91 Oct to see if the map would change my idle issue. Brought it from E85 to E37.7. Afrs and idle speed have no changed.

lyfeofkai · 10-27-2022, 04:19 PM

Quote:

Originally Posted by EvoZero

Did that and I Fuel Induction cleaned the motor at work. I pumped 91 Oct to see if the map would change my idle issue. Brought it from E85 to E37.7. Afrs and idle speed have no changed.

Old post, I know. But I’m curious if you ever found the cause/fix. I’m currently having the same code issue. Any help is greatly appreciated

Sent from my iPhone using Tapatalk

EvoZero · 10-27-2022, 05:13 PM

Quote:

Originally Posted by lyfeofkai

Old post, I know. But I’m curious if you ever found the cause/fix. I’m currently having the same code issue. Any help is greatly appreciated

Sent from my iPhone using Tapatalk

Faulty MAP sensor

10-13-2021, 02:11 PM	#6
K3rm1tth3fr0g Scooby Specialist Member#: 508105 Join Date: Nov 2019 Chapter/Region: NWIC Location: Greater Seattle Area Vehicle: Link G4X flex tuned 02' EJ205 20G 6MT wagon	I love when Ron comes in, makes his trademark snarky comment, only to be completely wrong LOL. Just like when he came onto my post discussing turbos only to accost me for comparing dissimilar turbos, when the specific model he brought up I hadn't even mentioned in the post... Gotta love forums man. Last edited by K3rm1tth3fr0g; 10-13-2021 at 03:34 PM.

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10-12-2021, 01:30 AM	#1
EvoZero Scooby Specialist Member#: 265326 Join Date: Nov 2010 Chapter/Region: BAIC Location: Bay Area CA Vehicle: 2006 STi Wagon	P0507 2006 wrx I have a 2006 wrx with IAG stage 3 block. I was tuned on 91/E85 flex and the car ran great. FP red, TOMEI UEL, speed density, fmic, tgv delete, Cobb 1300cc injectors, dw300 Rewired. Recently the code came on for high idle and it's been idling around 1100-1250 rpm's. I changed the front o2 sensor and have boost leaked checked the car. My tuner has no idea what's happening and I do not either. What should I start with? Afr at idle is 13.9-14.3 on my aem uego. When I get into boost, I see it go lean and then rich, when cruising it'll dip into the 10's when I get off the gas. * Registered users of the site do not see these ads.

10-12-2021, 01:46 PM	#2
Unabomber 👏 Big Ron 👏 Moderator Member#: 18062 Join Date: Apr 2002 Chapter/Region: MAIC Location: I can save you a ton of cash Vehicle: on car parts so PM me b4 j00 buy	The #1 cause of wonky idle in a Subaru: https://forums.nasioc.com/forums/sho...d.php?t=781242 Your tuner should have known this and I feel sad that he does not.

10-13-2021, 09:53 AM	#4
BlackFighter Scooby Specialist Member#: 193940 Join Date: Nov 2008 Location: Philly Vehicle: 2004 WRX STI Black RalliSpec Shortblock	Do you have your ac running when this happens?

10-13-2021, 03:00 PM	#7
StarkWRX Scooby Newbie Member#: 473969 Join Date: Sep 2017 Location: Pittsburgh, PA Vehicle: 2006 WRX World Rally Blue	Do you have a WBO2 sensor/gauge installed? And if so, does it coincide with the front O2 sensor?

10-15-2021, 02:03 PM	#9
EvoZero Scooby Specialist Member#: 265326 Join Date: Nov 2010 Chapter/Region: BAIC Location: Bay Area CA Vehicle: 2006 STi Wagon	Bump, front o2 sensor reads the same as my wideband during warm up and idle.

10-21-2021, 02:35 AM	#10
EvoZero Scooby Specialist Member#: 265326 Join Date: Nov 2010 Chapter/Region: BAIC Location: Bay Area CA Vehicle: 2006 STi Wagon	I am still looking for a solution. Not sure what else to do.

10-21-2021, 11:32 AM	#11
xtremewlr Scooby Newbie Member#: 525652 Join Date: Jul 2021 Chapter/Region: SWIC Location: Tucson, AZ Vehicle: 2006 STI WR Blue	I'm thinking you should seek out a different tuner. I agree with Unabomber in that your tuner should know what to look for or how to troubleshoot this. Your statement that he is at a loss as to what to do leads me to think he is rather inexperienced, at least with Subies.

10-23-2021, 12:31 AM	#17
EvoZero Scooby Specialist Member#: 265326 Join Date: Nov 2010 Chapter/Region: BAIC Location: Bay Area CA Vehicle: 2006 STi Wagon	Update, Pumped 91 Oct to see if things would change, same afr same idle.

10-25-2021, 09:13 PM	#18
FAFWrx Scooby Newbie Member#: 495917 Join Date: Jan 2019	Did you remove your TB and clean it?