CAMARO6 - View Single Post - Cold start hesitation like spits and sputters

Taco-Giz · 09-10-2025, 03:04 AM

Hey everyone,

I recently changed my car's spark plugs, and the performance has definitely improved. However, I've noticed an odd issue since the change:

If the car sits outside overnight, it sputters in the morning. (outside driveway has a slight slope)

If it stays in the garage overnight (flat ground), it runs fine with little to no sputtering, even after 3 consecutive mornings. -> https://youtube.com/shorts/ktciLBIaaNM

A thought just crossed my mind. could this be related to the PCV valve or the vapor canister purge valve..?

I saw somewhere that the PCV Valve needed to be replaced every 30k miles but I'm not sure it could cause the sputters on cold start..

09-10-2025, 03:04 AM	#35
Taco-Giz Drives: 2016 Camaro SS Join Date: Apr 2023 Location: FR Posts: 50	Hey everyone, I recently changed my car's spark plugs, and the performance has definitely improved. However, I've noticed an odd issue since the change: If the car sits outside overnight, it sputters in the morning. (outside driveway has a slight slope) If it stays in the garage overnight (flat ground), it runs fine with little to no sputtering, even after 3 consecutive mornings. -> https://youtube.com/shorts/ktciLBIaaNM A thought just crossed my mind. could this be related to the PCV valve or the vapor canister purge valve..? I saw somewhere that the PCV Valve needed to be replaced every 30k miles but I'm not sure it could cause the sputters on cold start.. Last edited by Taco-Giz; 09-10-2025 at 03:19 AM.