Nissan 370Z Forum - View Single Post

Jordo! · 02-25-2014, 05:06 PM

I was gonna say, that rattle sounds like something in the exhaust, so could be loose heatshield.

Random misses are frequently caused by intermittent vacuum leaks -- which may also cause the car to stall or the RPM's to drop as it attempts to get within the programmed idle range.

I'd check for a vacuum leak -- anything near the primary O2 could be the cause (including where the headers meet the cats), and definitely double check everything along the intake tract.

Good luck!

EDIT: wait, so you had bad coilpacks? Hmm.

Not sure about the other noise -- doesn't sound like valve tap to me. Any other symptoms?

02-25-2014, 05:06 PM	#30 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	I was gonna say, that rattle sounds like something in the exhaust, so could be loose heatshield. Random misses are frequently caused by intermittent vacuum leaks -- which may also cause the car to stall or the RPM's to drop as it attempts to get within the programmed idle range. I'd check for a vacuum leak -- anything near the primary O2 could be the cause (including where the headers meet the cats), and definitely double check everything along the intake tract. Good luck! EDIT: wait, so you had bad coilpacks? Hmm. Not sure about the other noise -- doesn't sound like valve tap to me. Any other symptoms? __________________ Enjoy it. Destroy it. Last edited by Jordo!; 02-25-2014 at 05:09 PM.