Engine stutters on start - no pattern to problem

markdubois370 · 09-27-2025, 06:05 PM

I have a 2011 370z with 144K. My problem is the engine will stutter and skip when I am starting the engine - but this is very infrequent and unpredictable when it happens. At first, the stutter start showed up when the fuel tank was less than a 1/4 tank. On a full tank, or anything more than a half tank - the problem does not occur. Maybe that is coincidental. I was told to replace the coils - but that did not resolve the problem. I took the vehicle to the Nissan dealership. The diagnostic report showed it "might be" the fuel pump.
I have driven the vehicle for the past week - from a full tank of gas to a quarter tank of gas - without any "stutter start" problems. The check engine light has been on the entire time.
I am confused by this and am beginning to believe that it might not be the fuel pump. I would appreciate any input or suggestions this forum could provide. If you have questions - I will monitor this post every day and will reply promptly. Thanks in advance for your help.

Spooler · 09-27-2025, 08:35 PM

Sound like your fuel pump hat may be broken. Only way to tell is to pull the fuel pump basket out and see what you see. CJ Motorsports offers a replacement for it.

markdubois370 · 09-28-2025, 06:32 AM

Thanks spooler. I appreciate your suggestion.

09-27-2025, 06:05 PM	#1 (permalink)
markdubois370 Base Member Join Date: Jun 2017 Location: Florida Posts: 7 Drives: 2011 370Z Rep Power: 9	Engine stutters on start - no pattern to problem I have a 2011 370z with 144K. My problem is the engine will stutter and skip when I am starting the engine - but this is very infrequent and unpredictable when it happens. At first, the stutter start showed up when the fuel tank was less than a 1/4 tank. On a full tank, or anything more than a half tank - the problem does not occur. Maybe that is coincidental. I was told to replace the coils - but that did not resolve the problem. I took the vehicle to the Nissan dealership. The diagnostic report showed it "might be" the fuel pump. I have driven the vehicle for the past week - from a full tank of gas to a quarter tank of gas - without any "stutter start" problems. The check engine light has been on the entire time. I am confused by this and am beginning to believe that it might not be the fuel pump. I would appreciate any input or suggestions this forum could provide. If you have questions - I will monitor this post every day and will reply promptly. Thanks in advance for your help. Last edited by markdubois370; 09-27-2025 at 06:15 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Different kind of key/start problem - help please	140BPM	Nissan 370Z Warranty / Scheduled Maintenance / Servicing / Repairs	5	08-27-2022 11:32 PM
Weird problem - Car wont start and switch off too!	te5al	Engine & Drivetrain	11	11-04-2019 07:35 AM
370z warm start problem	Jerm8664	Engine & Drivetrain	11	02-24-2017 06:00 PM
Car stutters braking at high speeds	Minsu	Brakes & Suspension	30	07-02-2014 09:09 PM

09-27-2025, 08:35 PM	#2 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,153 Drives: 2013 Nismo 370z Rep Power: 2684394	Sound like your fuel pump hat may be broken. Only way to tell is to pull the fuel pump basket out and see what you see. CJ Motorsports offers a replacement for it.

09-28-2025, 06:32 AM	#3 (permalink)
markdubois370 Base Member Join Date: Jun 2017 Location: Florida Posts: 7 Drives: 2011 370Z Rep Power: 9	Thanks spooler. I appreciate your suggestion.