Help!! Car Wont Start After Clutch Swap (25$ reward for solution!!) - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

bren5279 · 11-27-2014, 10:40 AM

*** SOLVED****

Out of all the cars Ive ever worked on Ive never been so stumped…. Just swapped a clutch in and now it won't start, yet it turns over just fine???
I officially have no ideas where to even begin… so Im offering 50$ to anyone who can lead me to the solution because I REALLY dont want to have it towed to a stealership.
2015 manual brz with prox key

Symptoms:
-wont start
-cranks perfectly fine
-key worked fine the night before
-no CEL
-all plugs plugged back in
-Doesnt even sputter or try to ignite…

What I did:
Swapped the clutch just exactly as the DIY says (including unplugging the battery), and changed the fluids with it.

Things Ive ruled out
-Battery is fine
-Starter turns it over fine
-Checked all fuses
-can hear fuel pump working
-rechecked all grounds
-has half tank of gas and started perfectly the night before
-(turns over, eliminating clutch switch, any jams, key, etc)

*** SOLUTION: Make sure the timing disk behind the flywheel does NOT rotate at all. Not 100% sure it was what caused it but after reinstalling everything and repositioning the disk it now starts.

Kevinn · 11-27-2014, 10:47 AM

Did you forget to plug something back in? Check any harnesses.

Also see if there are any codes set

bren5279 · 11-27-2014, 10:56 AM

No codes and there were only 2 plugs unplugged plus the battery, all are fine

FirestormFRS · 11-27-2014, 11:01 AM

Sounds like the anti theft system to me.

Ozzman · 11-27-2014, 11:09 AM

You sure you didn't pinch any wires between the block and bellhousing?

bren5279 · 11-27-2014, 11:23 AM

Absolutely positive.
Would the anti theft system allow it to still turn over?

Thorpedo · 11-27-2014, 11:31 AM

I tried starting mine with the two plugs on top of the transmission unplugged and it fired right up (just fyi).

Ozzman · 11-27-2014, 11:35 AM

Does the exhaust smell like raw fuel?

Thorpedo · 11-27-2014, 11:39 AM

Watch this.

[ame="https://www.youtube.com/watch?v=4uwZpFu8Z10"]https://www.youtube.com/watch?v=4uwZpFu8Z10[/ame]

I know his wasnt turning over. But it might be worth a watch.

bren5279 · 11-27-2014, 11:40 AM

Nope doesn't smell like fuel at all, I HIGHLY doubt its flooded

bren5279 · 11-27-2014, 11:46 AM

Quote:

Originally Posted by Thorpedo

Watch this.

I know his wasnt turning over. But it might be worth a watch.

Yeah my key light goes green and it turns over fine so idk…?

Ozzman · 11-27-2014, 11:52 AM

Do you have the ability to scan for codes?
Have you tried disconnecting the battery again?
Perhaps check the owners manual under antitheft.

Is there a crank position sensor that reads off the flywheel? Because if the ECU doesn't see the crank position signal it won't fire the injectors or the coils.

bren5279 · 11-27-2014, 12:01 PM

No but there also aren't any codes being thrown…
Yeah twice
Going to do that, but wouldn't that cause that to not turn over at all?

Yeah thats my main idea, however theres a sensing disk behind the flywheel that senses the position and its on the right way (as I can see from the opening at the bottom of the trans.

Awesome, dealership is closed. Upping it to 50$

Ozzman · 11-27-2014, 12:11 PM

You sure you don't have that disk 180 out of phase or something like that? If you can pull the #1 coil put a plug in it and reconnect to the harness and watch if it fires, that can narrow down problems. If you get one spark, and one spark only the problem likely lies with the crank sensor or the tone wheel. My money is on the tone wheel not being installed correctly or damaged.

11-27-2014, 11:31 AM	#7
Thorpedo The SquadWhisperer Join Date: Mar 2013 Drives: '13 Ultramarine FR-S (STX) Location: Nova Scotia, Canada Posts: 681 Thanks: 383 Thanked 477 Times in 207 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	I tried starting mine with the two plugs on top of the transmission unplugged and it fired right up (just fyi). __________________ 2013+14+15 Atlantic Region Motor Sports Autocross STX Champion 2013+14+15 Atlantic Region Motor Sports Overall Autocross Champion 2017 Bluenose Autosport Club Overall Rallycross Champion Powered by Great North Performance, Jani-King Canada, and OK Tire.

11-27-2014, 11:39 AM	#9
Thorpedo The SquadWhisperer Join Date: Mar 2013 Drives: '13 Ultramarine FR-S (STX) Location: Nova Scotia, Canada Posts: 681 Thanks: 383 Thanked 477 Times in 207 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	Watch this. [ame="https://www.youtube.com/watch?v=4uwZpFu8Z10"]https://www.youtube.com/watch?v=4uwZpFu8Z10[/ame] I know his wasnt turning over. But it might be worth a watch. __________________ 2013+14+15 Atlantic Region Motor Sports Autocross STX Champion 2013+14+15 Atlantic Region Motor Sports Overall Autocross Champion 2017 Bluenose Autosport Club Overall Rallycross Champion Powered by Great North Performance, Jani-King Canada, and OK Tire.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Car wont start? Anyone else?	ScionFrsFan	Issues \| Warranty \| Recalls / TSB	150	06-09-2017 09:35 PM
filled up w e85 now car wont start..id1000s dw65s jdl kit	kingkai23	Forced Induction	8	07-24-2014 10:56 AM
car wont start, winjet to blame??	7M-King	Cosmetic Modification (Interior/Exterior/Lighting)	21	12-29-2013 03:34 PM
Car Wont Start Up HELP !!***	ScionFR-S	Issues \| Warranty \| Recalls / TSB	20	11-28-2013 01:01 AM
URGENT : CAR WONT START	DarkCard	Engine, Exhaust, Transmission	9	08-01-2013 08:57 PM

11-27-2014, 10:40 AM	#1
bren5279 Senior Member Join Date: Apr 2014 Drives: series.blurrr Location: va Posts: 164 Thanks: 14 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Help!! Car Wont Start After Clutch Swap (25$ reward for solution!!) * SOLVED Out of all the cars Ive ever worked on Ive never been so stumped…. Just swapped a clutch in and now it won't start, yet it turns over just fine??? I officially have no ideas where to even begin… so Im offering 50$ to anyone who can lead me to the solution because I REALLY dont want to have it towed to a stealership. 2015 manual brz with prox key Symptoms: -wont start -cranks perfectly fine -key worked fine the night before -no CEL -all plugs plugged back in -Doesnt even sputter or try to ignite… What I did: Swapped the clutch just exactly as the DIY says (including unplugging the battery), and changed the fluids with it. Things Ive ruled out -Battery is fine -Starter turns it over fine -Checked all fuses -can hear fuel pump working -rechecked all grounds -has half tank of gas and started perfectly the night before -(turns over, eliminating clutch switch, any jams, key, etc) * SOLUTION: Make sure the timing disk behind the flywheel does NOT rotate at all. Not 100% sure it was what caused it but after reinstalling everything and repositioning the disk it now starts. Last edited by bren5279; 11-27-2014 at 10:30 PM.

11-27-2014, 10:47 AM	#2
Kevinn Member Join Date: Aug 2014 Drives: 2014 BRZ Limited, Black, Manual Location: Washington, USA Posts: 49 Thanks: 32 Thanked 8 Times in 6 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Did you forget to plug something back in? Check any harnesses. Also see if there are any codes set

11-27-2014, 10:56 AM	#3
bren5279 Senior Member Join Date: Apr 2014 Drives: series.blurrr Location: va Posts: 164 Thanks: 14 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	No codes and there were only 2 plugs unplugged plus the battery, all are fine

11-27-2014, 11:01 AM	#4
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)	Sounds like the anti theft system to me.

11-27-2014, 11:09 AM	#5
Ozzman Senior Member Join Date: Mar 2013 Drives: old Location: Roswell Posts: 232 Thanks: 188 Thanked 103 Times in 59 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	You sure you didn't pinch any wires between the block and bellhousing?

11-27-2014, 11:23 AM	#6
bren5279 Senior Member Join Date: Apr 2014 Drives: series.blurrr Location: va Posts: 164 Thanks: 14 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Absolutely positive. Would the anti theft system allow it to still turn over?

11-27-2014, 11:35 AM	#8
Ozzman Senior Member Join Date: Mar 2013 Drives: old Location: Roswell Posts: 232 Thanks: 188 Thanked 103 Times in 59 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Does the exhaust smell like raw fuel?

11-27-2014, 11:40 AM	#10
bren5279 Senior Member Join Date: Apr 2014 Drives: series.blurrr Location: va Posts: 164 Thanks: 14 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Nope doesn't smell like fuel at all, I HIGHLY doubt its flooded

11-27-2014, 11:52 AM	#12
Ozzman Senior Member Join Date: Mar 2013 Drives: old Location: Roswell Posts: 232 Thanks: 188 Thanked 103 Times in 59 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Do you have the ability to scan for codes? Have you tried disconnecting the battery again? Perhaps check the owners manual under antitheft. Is there a crank position sensor that reads off the flywheel? Because if the ECU doesn't see the crank position signal it won't fire the injectors or the coils.

11-27-2014, 12:01 PM	#13
bren5279 Senior Member Join Date: Apr 2014 Drives: series.blurrr Location: va Posts: 164 Thanks: 14 Thanked 18 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	No but there also aren't any codes being thrown… Yeah twice Going to do that, but wouldn't that cause that to not turn over at all? Yeah thats my main idea, however theres a sensing disk behind the flywheel that senses the position and its on the right way (as I can see from the opening at the bottom of the trans. Awesome, dealership is closed. Upping it to 50$

User Name		Remember Me?
Password

11-27-2014, 12:11 PM	#14
Ozzman Senior Member Join Date: Mar 2013 Drives: old Location: Roswell Posts: 232 Thanks: 188 Thanked 103 Times in 59 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	You sure you don't have that disk 180 out of phase or something like that? If you can pull the #1 coil put a plug in it and reconnect to the harness and watch if it fires, that can narrow down problems. If you get one spark, and one spark only the problem likely lies with the crank sensor or the tone wheel. My money is on the tone wheel not being installed correctly or damaged.