Hesitation
04-26-2013, 09:11 AM
#1
Registered User
Thread Starter
Join Date: May 2009
Location: Seymour, TN
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Hesitation
Hey guys. I have a 2008 G-37S. It is stock. I have had my local mechanic and Infinity dealership both inspect the car, and no error codes come up. Here is the problem: If you hit the gas in a normal every day manner, there is a half second of hesitation before the throttle kicks in. Has anyone else experienced this? If you nail the accelerator, it goes like a rocket, no issues, no hesitation. If you take off as if you are trying to save gas, you get the hesitation. My wife owns a FX-35 and it has linear acceleration, no hesitation.
On the flip side, while they were inspecting my car, they gave me a regular G-37 2010 model. It "seemed" like it had the same hesitation.
This has been going on since day 1. My mechanic has replaced the "knock" sensors trying to address the problem and I have run fuel injector cleaner through it several times. I am not a gear head and know little about the inner workings of the G-37s. I can change the oil and clean the K&N air filters, but that is about it.
Is it all in my head, a design in car, or does anyone have any idea what might be causing the hesitation?
On the flip side, while they were inspecting my car, they gave me a regular G-37 2010 model. It "seemed" like it had the same hesitation.
This has been going on since day 1. My mechanic has replaced the "knock" sensors trying to address the problem and I have run fuel injector cleaner through it several times. I am not a gear head and know little about the inner workings of the G-37s. I can change the oil and clean the K&N air filters, but that is about it.
Is it all in my head, a design in car, or does anyone have any idea what might be causing the hesitation?
04-26-2013, 09:41 AM
#2
Registered User
All G37's suffer from throttle lag from what I have read on the forums. You may want to try adding grounding wires, especially on the throttle bodies. I did and the issue is slightly improved but not gone. Also check with your dealer to make sure you have the updated software for the ECM and TCM, there is a TSB for throttle lag. If it is really bothering you then you might want to get an Uprev tune...
04-26-2013, 09:46 AM
#3
Registered User
Hey there fellow East Tennessean! I have an 09 G37X Coupe and I do not notice any hesitation, although my previous car was a 4cyl VTEC accord, so the G is a significant improvement in performance over that....
Anyway, there are a few discussions here on the forum about the hesitation. One thing you may want to ask the dealer is if there are any updates for your ECU or transmission.
Another thing is that the G supposedly learns your driving characteristics and adjusts the ECU to your habits. If the PO of your car drove like a granny, then it will possibly behave like that until it learns how you drive.
David
Anyway, there are a few discussions here on the forum about the hesitation. One thing you may want to ask the dealer is if there are any updates for your ECU or transmission.
Another thing is that the G supposedly learns your driving characteristics and adjusts the ECU to your habits. If the PO of your car drove like a granny, then it will possibly behave like that until it learns how you drive.
David
04-26-2013, 10:05 AM
#7
Registered User
Trending Topics
04-26-2013, 12:43 PM
#9
Registered User
Thread Starter
Join Date: May 2009
Location: Seymour, TN
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
I just found this link. Apparently this is a big issue:
https://www.myg37.com/forums/g37-cou...ottle-lag.html
https://www.myg37.com/forums/g37-cou...ottle-lag.html
04-26-2013, 01:44 PM
#11
Registered User
Now that I have stopped laughing ..... dealerships don't mention this kind of stuff, half the time you have to tell them and even then they deny it exists. You typically have to show a printed copy of the TSB or Update and insist they apply it.
04-26-2013, 02:34 PM
#12
Registered User
. In January I printed out the TSB and took it in, and they tried to convince me that there was no update for the 5AT (mine is 7AT) and that I should just get used to the lag and the harsh downshifts. Ugh.
02-20-2016, 06:10 PM
#13
Registered User
Join Date: Feb 2016
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Hey guys. I have a 2008 G-37S. It is stock. I have had my local mechanic and Infinity dealership both inspect the car, and no error codes come up. Here is the problem: If you hit the gas in a normal every day manner, there is a half second of hesitation before the throttle kicks in. Has anyone else experienced this? If you nail the accelerator, it goes like a rocket, no issues, no hesitation. If you take off as if you are trying to save gas, you get the hesitation. My wife owns a FX-35 and it has linear acceleration, no hesitation.
On the flip side, while they were inspecting my car, they gave me a regular G-37 2010 model. It "seemed" like it had the same hesitation.
This has been going on since day 1. My mechanic has replaced the "knock" sensors trying to address the problem and I have run fuel injector cleaner through it several times. I am not a gear head and know little about the inner workings of the G-37s. I can change the oil and clean the K&N air filters, but that is about it.
Is it all in my head, a design in car, or does anyone have any idea what might be causing the hesitation?
On the flip side, while they were inspecting my car, they gave me a regular G-37 2010 model. It "seemed" like it had the same hesitation.
This has been going on since day 1. My mechanic has replaced the "knock" sensors trying to address the problem and I have run fuel injector cleaner through it several times. I am not a gear head and know little about the inner workings of the G-37s. I can change the oil and clean the K&N air filters, but that is about it.
Is it all in my head, a design in car, or does anyone have any idea what might be causing the hesitation?
02-21-2016, 12:14 AM
#14
I've got a 2008 coupe automatic, I had the dealer perform an ecu update and throttle body cleaning which did actually fix the rpm stumble after coming to a stop (like a traffic light or something) and it fixed the random idle rpm spike which caused the car so surge when coming to a stop.
However it didn't fix the responsiveness issues. I had a 350z (3 actually) and one was auto with the same jatco re5r05a transmission as a 2008 g37 just with different software, and it had the same responsiveness issues. I'm assuming it's just the nature of the beast, the 5at trans is a workhorse but pretty outdated in comparison to modern transmissions at the time.
As far as a TSB, the dealer wouldn't acknowledge my car having it, but the software update was $150 and I drove two hours to an actual Infiniti dealer instead of my usual Nissan dealer, so I said screw it and paid the $150. It has helped though with issues.
However it didn't fix the responsiveness issues. I had a 350z (3 actually) and one was auto with the same jatco re5r05a transmission as a 2008 g37 just with different software, and it had the same responsiveness issues. I'm assuming it's just the nature of the beast, the 5at trans is a workhorse but pretty outdated in comparison to modern transmissions at the time.
As far as a TSB, the dealer wouldn't acknowledge my car having it, but the software update was $150 and I drove two hours to an actual Infiniti dealer instead of my usual Nissan dealer, so I said screw it and paid the $150. It has helped though with issues.
02-21-2016, 03:36 AM
#15
Registered Member
iTrader: (1)
The one thing I noticed about this lag, cuz I have it too, is I think its linked to the traction control. I have been driving with my VDC off and it has been a little more responsive. It still stutters a little but nothing like when it was on. It could just be psychological and I am by no means saying this is 100% the problem, but it is a noticeable difference to me