Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - P0300, P0303, Rough Idle/Surging and Stalling, 2017 BRZ 6MT bone stock

96z2 · 08-18-2022, 05:35 PM

2017 BRZ 6MT, 27,000 miles. Bone stock its entire life. Never tracked, driven very conservatively.

Just developed a super rough idle with lots of surging. I've only driven the car in this condition for about 10 minutes. At first it was able to idle when stopped for a traffic light, albeit with lots of surging and bucking and almost stalling. There didn't seem to be any power loss and the engine seems fine above 2500 RPM (though didn't go past 3500 RPM). It's just very rough 2000 RPM or lower. Eventually when I got home and let it idle for longer it stalled.

Have flashing CEL and pulled codes P0300 and P0303. Only thing I've checked so far is for a loose ground bolt for the DI computer and it seemed tight.

Any other ideas?

08-18-2022, 05:35 PM	#1
96z2 Member Join Date: May 2012 Drives: N/A Location: CA Posts: 49 Thanks: 13 Thanked 20 Times in 9 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	P0300, P0303, Rough Idle/Surging and Stalling, 2017 BRZ 6MT bone stock 2017 BRZ 6MT, 27,000 miles. Bone stock its entire life. Never tracked, driven very conservatively. Just developed a super rough idle with lots of surging. I've only driven the car in this condition for about 10 minutes. At first it was able to idle when stopped for a traffic light, albeit with lots of surging and bucking and almost stalling. There didn't seem to be any power loss and the engine seems fine above 2500 RPM (though didn't go past 3500 RPM). It's just very rough 2000 RPM or lower. Eventually when I got home and let it idle for longer it stalled. Have flashing CEL and pulled codes P0300 and P0303. Only thing I've checked so far is for a loose ground bolt for the DI computer and it seemed tight. Any other ideas? Last edited by 96z2; 08-18-2022 at 05:51 PM.