Help RPM Surge During "Normal" Acceleration
#1
Registered User
Thread Starter
RPM Surge During "Normal" Acceleration
2009 G37X Coupe with 7AT
Been noticing some peculiar behavior during normal acceleration. Usually happens when I get around 40mph and from my guess shifting between 3 and 4 or 4 and 5.
While accelerating my RPM's will suddenly surge up from 2000 to around 4000 and then drop rapidly down. Its kind of like when you miss a gear when shifting a manual. No consistency to it. May happen one day but not another. Doesn't matter if the car is warm or cold. Happens more while driving straight but has happened a few times driving around a curve which in turn makes the car feel quite unstable for a few seconds.
It did do it once pulling out into traffic and the car shot forward quite rapidly. My wife thought I "punched it" but I had not.
David
Been noticing some peculiar behavior during normal acceleration. Usually happens when I get around 40mph and from my guess shifting between 3 and 4 or 4 and 5.
While accelerating my RPM's will suddenly surge up from 2000 to around 4000 and then drop rapidly down. Its kind of like when you miss a gear when shifting a manual. No consistency to it. May happen one day but not another. Doesn't matter if the car is warm or cold. Happens more while driving straight but has happened a few times driving around a curve which in turn makes the car feel quite unstable for a few seconds.
It did do it once pulling out into traffic and the car shot forward quite rapidly. My wife thought I "punched it" but I had not.
David
The following users liked this post:
YellowJacket (05-11-2013)
#3
Registered User
Thread Starter
I took my car to the dealer not long after I got it for some warranty work and was told that they also "performed some updates". I just looked back at my service receipt and there is no mention of it. I'm familiar with the service bulletin and will call them on Monday to see if they can take care of it for me.
Thanks for the reply,
David
Thread
Thread Starter
Forum
Replies
Last Post
misc
Engine, Drivetrain & Forced-Induction
29
05-24-2023 03:57 PM
parkern
G37 Sedan
22
10-05-2015 12:12 PM