Engine Hesitation question

Discussion of Infiniti's amazing (and underrated) sport-luxury crossovers, the EX35 and EX37. For 2014, the EX series will be renamed QX50, in line with Ininfiit's new naming conventions.
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Joined: Sat Jan 11, 2020 1:43 pm
Car: 2015 QX50

Engine Hesitation question

Postby FLQX50 » Sun Jan 12, 2020 7:05 am

I have a 2015 QX50 with 87K. Six months ago, I started having engine hesitation when accelerating at a normal speed at no specific gear. Also, if I were to accelerate normally at speeds 50 to 70 MPH, I would sometimes get a slight hesitation with a very unique subtle vibration with low bass sound that is like crossing over a small section of cobblestone. I cleaned the mass airflow sensors, replaced the air intake filters, added a few fuel injector cleaners to my fuel tank, and it slightly helped the problem. I took it to my mechanic but he couldn’t figure it out. I took it to Infiniti and they had it for a week and Infiniti could not figure it out.

I started using using only premium gas and the problem went away until now. I just cleaned the throttle body and added two more fuel injector cleaners without any success. The problem seems to less pronounced when I am in Automanual mode.

Any ideas?

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Rogue One
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Re: Engine Hesitation question

Postby Rogue One » Sun Jan 12, 2020 4:51 pm

Duplicate post deleted.

Just a friendly FYI:

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