p0365, p0366, p0340, p0341 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

blsfrs · 04-02-2021, 02:41 PM

This started with slight loss of power but initially no cel. Good oil pressure and temps. Brought it into paddock. Cut it off. On restart it ran rough and I got P0303. It was late, I drove it 10 miles to and from motel. Then it started running rougher and the cam codes (p0365, p0366, p0340, p0341) popped up. I trailered it home, replaced # 3coil pack and plug. Cleared codes, cam codes came back. Rough idle, dies when I open throttle. No mechanical sounds to indicate busted rocker arm. The n/a engine has 10k on rebuild with oversize Ferrea valves and springs. Builder suggests over-rev (which didn't happen) with rocker arm or valve spring damage. Going to pull valve cover and check compression tomorrow when it's warmer. Any other ideas? Thx.

NoHaveMSG · 04-02-2021, 02:55 PM

Nothing indicates that it is mechanical based on those codes. I'd start by inspecting the sensors, connectors, and wire harness to the sensors. Those are easy to damage pulling the engine, especially the exhaust cam sensors.

blsfrs · 04-02-2021, 04:21 PM

Thanks. The engine has been in the car for a couple of years. I did put a new clutch in couple of months ago. I'll go over the connections again.

blsfrs · 04-05-2021, 11:27 AM

0 compression on #3. 120 on #1. 160-170 on other side. Engine coming out next weekend. Will update.

NoHaveMSG · 04-05-2021, 12:06 PM

Damn that sucks.

Sent from my iPhone using Tapatalk

blsfrs · 04-10-2021, 10:03 PM

It gets worse. Dropped both intake rockers on cyl #3 and broke bank 1 timing chain.

NoHaveMSG · 04-11-2021, 12:08 AM

Quote:

Originally Posted by blsfrs

It gets worse. Dropped both intake rockers on cyl #3 and broke bank 1 timing chain.

Well that explains the codes. Wonder what killed the chain? Both my rockers that kicked out stayed in their general area.

blsfrs · 04-11-2021, 01:14 PM

It's kind of a mystery. The rockers were just laying in the bottom of the valve cover. No damage to cams or cover. Shims were still on the valves. Pivots were in place. Just losing rockers shouldn't break the chain. I was on the track when it started losing power but there was no catastrophic moment where things went bad. I'm looking for an FA20 engine builder in my general geographical area for the repair. My original guy moved out of the area.

blsfrs · 05-31-2021, 10:30 AM

Finally found someone I trust (Perfect Circle Engines, Bunker Hill, WVa) to look at my engine. He's got the top end torn down. We're not sure what's going on with #3 cylinder/piston so he's going to disassemble the bottom end.

05-31-2021, 10:30 AM	#9
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,440 Thanks: 2,684 Thanked 1,442 Times in 685 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	Update Finally found someone I trust (Perfect Circle Engines, Bunker Hill, WVa) to look at my engine. He's got the top end torn down. We're not sure what's going on with #3 cylinder/piston so he's going to disassemble the bottom end. Attached Images

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
P0365 Fault Code	rtalich	Engine, Exhaust, Transmission	5	08-26-2023 03:58 PM
P0341 after flashing back to stock from ecutek	thecarfilmer	Issues \| Warranty \| Recalls / TSB	1	04-02-2019 07:10 AM
Engine Code P0366	eightsevenzero	Issues \| Warranty \| Recalls / TSB	1	11-18-2018 01:41 AM
No Start Condition (Codes P0340, P0341, P0365, P0366)	TheMollusk	Issues \| Warranty \| Recalls / TSB	21	11-09-2018 03:35 PM
P0341	Jaknar	Issues \| Warranty \| Recalls / TSB	1	01-14-2013 02:59 PM

04-02-2021, 02:41 PM	#1
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,440 Thanks: 2,684 Thanked 1,442 Times in 685 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	p0365, p0366, p0340, p0341 This started with slight loss of power but initially no cel. Good oil pressure and temps. Brought it into paddock. Cut it off. On restart it ran rough and I got P0303. It was late, I drove it 10 miles to and from motel. Then it started running rougher and the cam codes (p0365, p0366, p0340, p0341) popped up. I trailered it home, replaced # 3coil pack and plug. Cleared codes, cam codes came back. Rough idle, dies when I open throttle. No mechanical sounds to indicate busted rocker arm. The n/a engine has 10k on rebuild with oversize Ferrea valves and springs. Builder suggests over-rev (which didn't happen) with rocker arm or valve spring damage. Going to pull valve cover and check compression tomorrow when it's warmer. Any other ideas? Thx. Last edited by blsfrs; 04-02-2021 at 02:43 PM. Reason: miss spell

04-02-2021, 04:21 PM	#3
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,440 Thanks: 2,684 Thanked 1,442 Times in 685 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	Thanks. The engine has been in the car for a couple of years. I did put a new clutch in couple of months ago. I'll go over the connections again.

04-05-2021, 11:27 AM	#4
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,440 Thanks: 2,684 Thanked 1,442 Times in 685 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	0 compression on #3. 120 on #1. 160-170 on other side. Engine coming out next weekend. Will update.

04-10-2021, 10:03 PM	#6
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,440 Thanks: 2,684 Thanked 1,442 Times in 685 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	It gets worse. Dropped both intake rockers on cyl #3 and broke bank 1 timing chain.

04-11-2021, 01:14 PM	#8
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,440 Thanks: 2,684 Thanked 1,442 Times in 685 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	It's kind of a mystery. The rockers were just laying in the bottom of the valve cover. No damage to cams or cover. Shims were still on the valves. Pivots were in place. Just losing rockers shouldn't break the chain. I was on the track when it started losing power but there was no catastrophic moment where things went bad. I'm looking for an FA20 engine builder in my general geographical area for the repair. My original guy moved out of the area.

User Name		Remember Me?
Password