P0300 code after mods

Mfangman2024 · 02-25-2015, 09:41 AM

I have installed test pipes, true dual exhaust, and electronic cut outs.
I have had all of this on the Z for a few l ok nths now with no issue. I popped the code two days ago. It has been really cold here lately. Could the code have something to do with the weather? Something to do with the difference in the cut outs being open or closed. Or just the cat delete in general. Also I haven't noticed these issues until after I waked one of the cutouts on a speed bump....maybe caused an exhaust leak? Could that be the issue?. I ordered a new full cat back exhaust system. Hoping to at least narrow down the possibilities...... shield have new system installed next week. Does anyone have any ideas or maybe has had this issue before?........

maizenblue · 02-25-2015, 08:52 PM

The P0300 is unfortunately a very general code for random/multiple cylinder misfires. Many different things could be causing the code. The only thing you know is that it is effecting the engine as a whole and not any specific cylinder. If it were an exhaust leak I think it would be throwing a different code related to the o2 sensors

02-25-2015, 09:41 AM	#1 (permalink)
Mfangman2024 Base Member Join Date: Jul 2014 Location: Lawton Posts: 7 Drives: 370z base Rep Power: 10	P0300 code after mods I have installed test pipes, true dual exhaust, and electronic cut outs. I have had all of this on the Z for a few l ok nths now with no issue. I popped the code two days ago. It has been really cold here lately. Could the code have something to do with the weather? Something to do with the difference in the cut outs being open or closed. Or just the cat delete in general. Also I haven't noticed these issues until after I waked one of the cutouts on a speed bump....maybe caused an exhaust leak? Could that be the issue?. I ordered a new full cat back exhaust system. Hoping to at least narrow down the possibilities...... shield have new system installed next week. Does anyone have any ideas or maybe has had this issue before?........

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
P0300 code - SES Light came on, got the code verified, now the light is off	kittens	Engine & Drivetrain	1	12-26-2013 06:02 PM
09 370z stillen gen 3 error code P0300????	1littlekerr	Tuning	12	07-10-2013 05:50 PM
Stillen G3's and code P0300 Random Misfire?	The Shocker	Intake/Exhaust	11	11-21-2012 09:25 PM
P0300 random misfire code HELP!	Alchemy	Nissan 370Z Warranty / Scheduled Maintenance / Servicing / Repairs	12	12-02-2011 05:34 PM
Code P0300 after CBE install	ProfessorDave	Engine & Drivetrain	10	10-26-2010 04:42 PM

02-25-2015, 08:52 PM	#2 (permalink)
maizenblue Enthusiast Member Join Date: Sep 2013 Location: Denver Posts: 288 Drives: 2010 370Z Rep Power: 11	The P0300 is unfortunately a very general code for random/multiple cylinder misfires. Many different things could be causing the code. The only thing you know is that it is effecting the engine as a whole and not any specific cylinder. If it were an exhaust leak I think it would be throwing a different code related to the o2 sensors