Brz turbo idle issue - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Aalyluvsjdm · 06-29-2015, 07:15 AM

Hey guys!

Specs:

Garrett 50 trim turbo
Tial Q BOV
Tial 38mm external wastegate
Greddy EBC
Mishimoto FMIC
Invidia N1 catback
The car is running on 11-12 psi on 90 octane because im in AK and the highest grade they have is 90 smh

So the issue is that every time i drive the car after the warm up, if i take it out of gear it dies, or if i sit and rev the engine after the warm up it dies as well, i talk to my tuner and sent him logs and he cant figure out whats going on!

Checked for boost leaks and vac leaks nothing!!! Took apart the whole intake manifold and fuel system didnt find anything wrong except all the lose vac lines but even after clamping all of the lose vac lines still having issues.
Help!!!!!

IBill4You · 06-29-2015, 08:13 AM

In for answers. Sorry I don't have them, but I hope you get things straightened out. Who made your exhaust manifold and down pipe?

fika84 · 06-29-2015, 11:08 AM

Try putting this in the Forced Induction area.

King Tut · 06-29-2015, 12:37 PM

Picture of the engine bay. Where exactly is that Tial Q BOV located and how close to the MAF?

FirestormFRS · 06-29-2015, 04:01 PM

11psi seems a bit excessive for 90 fuel.

nelsmar · 06-29-2015, 04:05 PM

What injectors.... and where is the BOV / MAF sensor? Is the MAF on a bend? Your tuner should be able to easily tell you what is wrong. If not then you should probably question your tuner and find another one...

This is the kind of question that no one here is going to be able to just give you the answer as to why its not working. We would need specifics on your turbo kit, fuel system, and logs... If you have aftermarket injectors there can be an obvious answer as to why the car stalls.

#maverick# · 06-29-2015, 05:56 PM

Does your BOV hang open at warm idle? I have the tial q as well and it would hang open at warm idle. MAF sensor location?

protpibe · 06-29-2015, 06:36 PM

Quote:

Originally Posted by Aalyluvsjdm

Hey guys!

Specs:

Garrett 50 trim turbo
Tial Q BOV
Tial 38mm external wastegate
Greddy EBC
Mishimoto FMIC
Invidia N1 catback
The car is running on 11-12 psi on 90 octane because im in AK and the highest grade they have is 90 smh

So the issue is that every time i drive the car after the warm up, if i take it out of gear it dies, or if i sit and rev the engine after the warm up it dies as well, i talk to my tuner and sent him logs and he cant figure out whats going on!

Checked for boost leaks and vac leaks nothing!!! Took apart the whole intake manifold and fuel system didnt find anything wrong except all the lose vac lines but even after clamping all of the lose vac lines still having issues.
Help!!!!!

Did you recently install a light weight crank pulley and/or a lightened flywheel? My idle went to shiz after I lightened the rotational mass on the crank. If that's what happened to yours, your tuner will need to compensate

leets4uc3 · 07-14-2017, 10:43 AM

did you resolve this issue? I am seeing a similar issue.

go_a_way1 · 07-14-2017, 12:16 PM

Quote:

Originally Posted by leets4uc3

did you resolve this issue? I am seeing a similar issue.

Check for leaks around the MAF, check your MAP is in good working order, check your BOV is not hanging open. Those are all very common issues in the turbo frs world haha.

Sportsguy83 · 07-14-2017, 01:28 PM

If the tests don't reveal any mechanical problems and/or boost/vacuum leaks, it's time to talk to the tuner

BRZoomTX · 07-14-2017, 01:47 PM

This issue can happen when the port injectors aren't scaled properly. Idle can be running DI or PI at different times. The stalling usually happens when you car switches from DI to PI at idle and the port injectors supply the wrong fueling. The car bogs and dies after.

Check your logs to see if your car is switching to port injection when it dies to confirm the issue. If so, it can be fixed via proper port injector scaling.

leets4uc3 · 07-14-2017, 02:40 PM

Quote:

Originally Posted by Sportsguy83

If the tests don't reveal any mechanical problems and/or boost/vacuum leaks, it's time to talk to the tuner

Quote:

Originally Posted by BRZoomTX

This issue can happen when the port injectors aren't scaled properly. Idle can be running DI or PI at different times. The stalling usually happens when you car switches from DI to PI at idle and the port injectors supply the wrong fueling. The car bogs and dies after.

Check your logs to see if your car is switching to port injection when it dies to confirm the issue. If so, it can be fixed via proper port injector scaling.

Cool. I will be doing a smoke test today so hopefully I find something. I am also getting a hard start. Cranks for a while before starting. Yesterday it wouldn't start at all after it stalled. Also, it happens more as the temperature goes up. I was thinking of checking out the cam and crank position sensors too.

Icecreamtruk · 07-14-2017, 03:00 PM

Quote:

Originally Posted by leets4uc3

Cool. I will be doing a smoke test today so hopefully I find something. I am also getting a hard start. Cranks for a while before starting. Yesterday it wouldn't start at all after it stalled. Also, it happens more as the temperature goes up. I was thinking of checking out the cam and crank position sensors too.

If you have a cam position sensor trouble you would have a code show up with the trouble, either one from (P0016 to P0019, P0016 is the most common one as that is on passanger side, where most of the trapped heat is and damage things over time). If you dont have this problems I wouldnt be looking for cam troubles just yet. Get logs going, its the easiest way to find out what is wrong. If you can interpret them or pull conclusions from them, post them here, and Im sure some people would be glad to help.

06-29-2015, 07:15 AM	#1
Aalyluvsjdm Junior Member Join Date: Mar 2015 Drives: Red subaru brz Location: Ak, fairbanks Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Brz turbo idle issue Hey guys! Specs: Garrett 50 trim turbo Tial Q BOV Tial 38mm external wastegate Greddy EBC Mishimoto FMIC Invidia N1 catback The car is running on 11-12 psi on 90 octane because im in AK and the highest grade they have is 90 smh So the issue is that every time i drive the car after the warm up, if i take it out of gear it dies, or if i sit and rev the engine after the warm up it dies as well, i talk to my tuner and sent him logs and he cant figure out whats going on! Checked for boost leaks and vac leaks nothing!!! Took apart the whole intake manifold and fuel system didnt find anything wrong except all the lose vac lines but even after clamping all of the lose vac lines still having issues. Help!!!!!

06-29-2015, 12:37 PM	#4
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	Picture of the engine bay. Where exactly is that Tial Q BOV located and how close to the MAF? __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

06-29-2015, 04:05 PM	#6
nelsmar Senior Member Join Date: Feb 2013 Drives: FR-S Location: Phoenix Posts: 2,605 Thanks: 733 Thanked 2,361 Times in 1,031 Posts Mentioned: 345 Post(s) Tagged: 3 Thread(s)	What injectors.... and where is the BOV / MAF sensor? Is the MAF on a bend? Your tuner should be able to easily tell you what is wrong. If not then you should probably question your tuner and find another one... This is the kind of question that no one here is going to be able to just give you the answer as to why its not working. We would need specifics on your turbo kit, fuel system, and logs... If you have aftermarket injectors there can be an obvious answer as to why the car stalls. __________________ When I grow up, I wanna be God. My flickr - *Canibeat* Local magazine scout Old Setup: Vortech Supercharged 360WHP/262WTQ @ 11.5psi My build thread - WTF happened to nelsmar's car thread

06-29-2015, 05:56 PM	#7
#maverick# Senior Member Join Date: May 2014 Drives: 2006 Pontiac GP (SOLD), 2014 FR-S Location: Chicago Posts: 378 Thanks: 296 Thanked 145 Times in 113 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Does your BOV hang open at warm idle? I have the tial q as well and it would hang open at warm idle. MAF sensor location? __________________ "Project cars are like New Years Eve. Endless preparation, hype, a sleepless night of fun, followed promptly by massive headaches and regret." - Anonymous

07-14-2017, 01:47 PM	#12
BRZoomTX Senior Member Join Date: Mar 2015 Drives: '13 BRZ Location: Texas Posts: 362 Thanks: 179 Thanked 235 Times in 149 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	This issue can happen when the port injectors aren't scaled properly. Idle can be running DI or PI at different times. The stalling usually happens when you car switches from DI to PI at idle and the port injectors supply the wrong fueling. The car bogs and dies after. Check your logs to see if your car is switching to port injection when it dies to confirm the issue. If so, it can be fixed via proper port injector scaling. __________________ '13 WRB BRZ ~470whp // Instagram // YouTube

06-29-2015, 04:01 PM	#5
FirestormFRS Senior Member Join Date: Jul 2012 Drives: 2013 FR-S Location: Anytown Posts: 920 Thanks: 73 Thanked 643 Times in 302 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	11psi seems a bit excessive for 90 fuel.

07-14-2017, 10:43 AM	#9
leets4uc3 Member Join Date: Feb 2017 Drives: Sprintex carbon fiber wide body Location: arizona Posts: 77 Thanks: 28 Thanked 15 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	did you resolve this issue? I am seeing a similar issue.

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