2015 FA20 engine in 2013 car - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Hydropkd · 08-14-2022, 05:30 PM

Have a question. I have a 2013 FRS base 6 speed with 62,000 miles. We bought it with a blown engine. Bought a 2015 engine with 30,000 miles installed it and it's stuck in limp mode 4k max. Thought maybe needed to drive to relearn everything, didn't work. Found out the wiring harnesses are different. So we changed out harness and all sensors and electronics from the 2013 engine, didn't change fuel injection parts. Only driven about 25 miles since changing that stuff. Still won't go above 4k. Any ideas?

Brz-123 · 08-14-2022, 05:34 PM

The ignition coil connectors are different too. Did you change them?

Sent from my SM-G781B using Tapatalk

Hydropkd · 08-14-2022, 06:28 PM

Yes changed the coil packs, just not the fuel injectors and the fuel sensors

soundman98 · 08-14-2022, 07:20 PM

i believe the cam sensors are different as well. first engine iteration was a sensor wheel with four 'tits' sticking up for sensing, 15+ is 4 'divots', basically entirely opposite sensing

Hydropkd · 08-14-2022, 07:31 PM

Quote:

Originally Posted by soundman98

i believe the cam sensors are different as well. first engine iteration was a sensor wheel with four 'tits' sticking up for sensing, 15+ is 4 'divots', basically entirely opposite sensing

Do you mean the cam gears?

soundman98 · 08-14-2022, 08:10 PM

found this thread:
https://www.ft86club.com/forums/showthread.php?t=84282

there's also this pdf for the '17 model year changes, they did some incremental changes in '15 that were detailed above. engine mods start at page 71
https://uploads.tapatalk-cdn.com/file...17MY_BRZ_1.pdf

on page 85, it talks about the cam angle sensor plates i was previously talking about. and i was incorrect. they moved from 'valleys', to 'tits' on the '17 model. but it's still a drastic difference in sensor methods

blsfrs · 08-15-2022, 08:57 AM

Quote:

Originally Posted by soundman98

found this thread:
https://www.ft86club.com/forums/showthread.php?t=84282

there's also this pdf for the '17 model year changes, they did some incremental changes in '15 that were detailed above. engine mods start at page 71
https://uploads.tapatalk-cdn.com/file...17MY_BRZ_1.pdf

on page 85, it talks about the cam angle sensor plates i was previously talking about. and i was incorrect. they moved from 'valleys', to 'tits' on the '17 model. but it's still a drastic difference in sensor methods

I didn't have time to completely read through the links but, are there any obvious external differences on the engine that op can use to distinguish which engine he has.

Also the 2nd link is marked "Confidential". Did it come from Mar-A-Lago?

soundman98 · 08-15-2022, 10:47 PM

it was posted in 2016 on these forums. so, yes?

Hydropkd · 08-17-2022, 05:05 AM

No obvious differences in the two engines, the coil packs have different wiring, changed harness used 2013 coils

Tcoat · 08-17-2022, 09:27 AM

Quote:

Originally Posted by blsfrs

I didn't have time to completely read through the links but, are there any obvious external differences on the engine that op can use to distinguish which engine he has.

Also the 2nd link is marked "Confidential". Did it come from Mar-A-Lago?

https://www.ft86club.com/forums/showthread.php?t=128854

Hydropkd · 08-19-2022, 07:29 PM

The engine says k823750. What does this tell me?

AussieBRZ · 08-19-2022, 07:49 PM

Ok if its got no codes and toyota\subaru cannot work it out im guessing its a tuned ecu and one of the leatures like launch flat foot shift auto blip could ve the issue

Usually with standard limp mode you get DTC code from one or more modules triggering limp

Check clutch derection switch this can trigger launcg flat foot shift mode or auto blip and srop car reving over a certian rpm

im assuming it wont rev over 4000 when its stationary and when moving

do you have a software tool like oft tactrix or ecutek to read ecu data or at leat log data ? if we can see some logs of what happens at 4000 might be a clue

AussieBRZ · 08-19-2022, 07:53 PM

Oh also with car on engine running and cruise control off, try pulling back on cruise stalk if rpm indicated on tacometer jumps to 1000 2000 3000 or 4000 without the engine rpm changing then its got an ecutek tune

Hydropkd · 08-21-2022, 11:32 PM

Oh, yea it's 4k in every gear and if you don't change gears it will die and the tach gets stuck on 4k

08-14-2022, 05:30 PM	#1
Hydropkd Member Join Date: Aug 2022 Drives: 2013 frs Location: TN Posts: 15 Thanks: 16 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	2015 FA20 engine in 2013 car Have a question. I have a 2013 FRS base 6 speed with 62,000 miles. We bought it with a blown engine. Bought a 2015 engine with 30,000 miles installed it and it's stuck in limp mode 4k max. Thought maybe needed to drive to relearn everything, didn't work. Found out the wiring harnesses are different. So we changed out harness and all sensors and electronics from the 2013 engine, didn't change fuel injection parts. Only driven about 25 miles since changing that stuff. Still won't go above 4k. Any ideas?

08-14-2022, 07:20 PM	#4
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	i believe the cam sensors are different as well. first engine iteration was a sensor wheel with four 'tits' sticking up for sensing, 15+ is 4 'divots', basically entirely opposite sensing __________________ "The time you enjoy wasting is not wasted time"

08-14-2022, 08:10 PM	#6
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	found this thread: https://www.ft86club.com/forums/showthread.php?t=84282 there's also this pdf for the '17 model year changes, they did some incremental changes in '15 that were detailed above. engine mods start at page 71 https://uploads.tapatalk-cdn.com/file...17MY_BRZ_1.pdf on page 85, it talks about the cam angle sensor plates i was previously talking about. and i was incorrect. they moved from 'valleys', to 'tits' on the '17 model. but it's still a drastic difference in sensor methods __________________ "The time you enjoy wasting is not wasted time"

08-15-2022, 10:47 PM	#8
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	it was posted in 2016 on these forums. so, yes? __________________ "The time you enjoy wasting is not wasted time"

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08-14-2022, 05:34 PM	#2
Brz-123 Senior Member Join Date: Mar 2018 Drives: BRZ Location: UK Posts: 154 Thanks: 74 Thanked 80 Times in 59 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	The ignition coil connectors are different too. Did you change them? Sent from my SM-G781B using Tapatalk

08-14-2022, 06:28 PM	#3
Hydropkd Member Join Date: Aug 2022 Drives: 2013 frs Location: TN Posts: 15 Thanks: 16 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yes changed the coil packs, just not the fuel injectors and the fuel sensors

08-17-2022, 05:05 AM	#9
Hydropkd Member Join Date: Aug 2022 Drives: 2013 frs Location: TN Posts: 15 Thanks: 16 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	No obvious differences in the two engines, the coil packs have different wiring, changed harness used 2013 coils

08-19-2022, 07:29 PM	#11
Hydropkd Member Join Date: Aug 2022 Drives: 2013 frs Location: TN Posts: 15 Thanks: 16 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	The engine says k823750. What does this tell me?

08-19-2022, 07:49 PM	#12
AussieBRZ Senior Member Join Date: Aug 2022 Drives: WRB BRZ Location: Australia Posts: 112 Thanks: 14 Thanked 51 Times in 36 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Ok if its got no codes and toyota\subaru cannot work it out im guessing its a tuned ecu and one of the leatures like launch flat foot shift auto blip could ve the issue Usually with standard limp mode you get DTC code from one or more modules triggering limp Check clutch derection switch this can trigger launcg flat foot shift mode or auto blip and srop car reving over a certian rpm im assuming it wont rev over 4000 when its stationary and when moving do you have a software tool like oft tactrix or ecutek to read ecu data or at leat log data ? if we can see some logs of what happens at 4000 might be a clue

08-19-2022, 07:53 PM	#13
AussieBRZ Senior Member Join Date: Aug 2022 Drives: WRB BRZ Location: Australia Posts: 112 Thanks: 14 Thanked 51 Times in 36 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Oh also with car on engine running and cruise control off, try pulling back on cruise stalk if rpm indicated on tacometer jumps to 1000 2000 3000 or 4000 without the engine rpm changing then its got an ecutek tune

08-21-2022, 11:32 PM	#14
Hydropkd Member Join Date: Aug 2022 Drives: 2013 frs Location: TN Posts: 15 Thanks: 16 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Oh, yea it's 4k in every gear and if you don't change gears it will die and the tach gets stuck on 4k

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