6MT hesitation when accelerating under 3k rpms
Registered Member
Joined: Apr 2016
Posts: 54
Likes: 9
Did you ever resolve the issue? I’ve been having this issue since owning the car, though it’s gotten worse over time.
New spark plugs going in this weekend, have cleaned MAFs / TBs, bought a Stillen intake, tried grounding the throttle bodies. No luck. My issue does seem to be correlated to temperature - happens more when it’s really hot out or after a period of heavy acceleration.
An ecu reset or turning off the car often fix it for a time, but then it returns. Any ideas? My next steps, in order of my willingness to try them (assuming plugs don’t do it):
- accelerator pedal sensor
- coil packs
- throttle bodies / throttle position sensors (my understanding is these can’t be separated)
- body control module
- engine control module
New spark plugs going in this weekend, have cleaned MAFs / TBs, bought a Stillen intake, tried grounding the throttle bodies. No luck. My issue does seem to be correlated to temperature - happens more when it’s really hot out or after a period of heavy acceleration.
An ecu reset or turning off the car often fix it for a time, but then it returns. Any ideas? My next steps, in order of my willingness to try them (assuming plugs don’t do it):
- accelerator pedal sensor
- coil packs
- throttle bodies / throttle position sensors (my understanding is these can’t be separated)
- body control module
- engine control module
Thread Starter
Registered Member
Joined: Apr 2012
Posts: 15
Likes: 2
From: Baton Rouge, LA
Heck no, I still deal with this on a daily basis. I've narrowed it down to turns. When attempting to accelerate in a curve, usually to the right, it'll start acting up. It could be turning on a road, or a big curve at the speed limit.
I will usually power the car down while while driving by pressing the power button 4 times quickly, leave it in gear, and then press it again a few seconds later to turn it back on. That will USUALLY fix it temporarily.
You might have luck with the accelerator pedal position sensor, but I heard you have to replace the entire pedal to get that done. But if it acts up when I curve, I wonder if it's a wheel speed sensor...
I will usually power the car down while while driving by pressing the power button 4 times quickly, leave it in gear, and then press it again a few seconds later to turn it back on. That will USUALLY fix it temporarily.
You might have luck with the accelerator pedal position sensor, but I heard you have to replace the entire pedal to get that done. But if it acts up when I curve, I wonder if it's a wheel speed sensor...
Registered Member
Joined: Oct 2016
Posts: 144
Likes: 9
From: San Antonio, TX
Have you all tried tuning the car? Even if it does not have mods, I've heard around that a tune greatly increases the "performance" of these G's. I'm not saying giving you more power, it just increases response and gets rid of lag/hesitation. There is a youtube video of a guy explaining his experience with this.
Thread Starter
Registered Member
Joined: Apr 2012
Posts: 15
Likes: 2
From: Baton Rouge, LA
I considered it, I just can't stand to spend the money if it doesn't fix the issue. I would love to tune the car outside of my issue, but I feel like I could probably do some logging to figure it out. Only problem is, it significantly reduces gas mileage, and this is my daily driver...
We all bought the same car, knowing it gets crappy mileage.
Wait... this thread is a year old. Have you been dealing with this for a year?
Registered Member
Joined: Jan 2015
Posts: 314
Likes: 22
From: Kazakhstan, Chicago, San Jose
Your issue could be anything from the way you describe it. could be something simple or something complicated. Your best bet is to find a good infiniti nissan specialist and let him narrow it down, instead of taking it to the dealer where they dont really care about your problem and charge you each time
Registered Member
Joined: Oct 2016
Posts: 144
Likes: 9
From: San Antonio, TX
I've got a full straight pipe exhaust with no tune and my gas mileage is only poor when I'm flooring it. Otherwise I have seen no difference between that and stock. If anything..a tune might help mpg, again, as long as you arent flooring it left and right. Flooring it is what wastes gas. Even a prius or econoboost ford engine will get crappy mpg if you're flooring it.
Thread Starter
Registered Member
Joined: Apr 2012
Posts: 15
Likes: 2
From: Baton Rouge, LA
I'm not trying to start another mpg thread...
Do you mean approach a shop tech or specialist, and get him to do this on his off time? It's been to the dealership 3 times, and they hage spent weeks (collectively) trying to solve it. One tech finally noticed it with me driving, but couldn't replicate with his equipment connected.
Anybody have a recommendation on a tune? Which one is better for logging?
Your issue could be anything from the way you describe it. could be something simple or something complicated. Your best bet is to find a good infiniti nissan specialist and let him narrow it down, instead of taking it to the dealer where they dont really care about your problem and charge you each time
Anybody have a recommendation on a tune? Which one is better for logging?
Fair point, OP.Do you mean approach a shop tech or specialist, and get him to do this on his off time? It's been to the dealership 3 times, and they hage spent weeks (collectively) trying to solve it. One tech finally noticed it with me driving, but couldn't replicate with his equipment connected.
Sorry. On some level I relate, because I've been living with a mysterious rear suspension noise that makes me miserable. Not at all the same thing, because a noise can get tracked down and fixed. Your problem seems really elusive.
Registered User
Joined: Nov 2012
Posts: 8
Likes: 1
Heck no, I still deal with this on a daily basis. I've narrowed it down to turns. When attempting to accelerate in a curve, usually to the right, it'll start acting up. It could be turning on a road, or a big curve at the speed limit.
I will usually power the car down while while driving by pressing the power button 4 times quickly, leave it in gear, and then press it again a few seconds later to turn it back on. That will USUALLY fix it temporarily.
You might have luck with the accelerator pedal position sensor, but I heard you have to replace the entire pedal to get that done. But if it acts up when I curve, I wonder if it's a wheel speed sensor...
I will usually power the car down while while driving by pressing the power button 4 times quickly, leave it in gear, and then press it again a few seconds later to turn it back on. That will USUALLY fix it temporarily.
You might have luck with the accelerator pedal position sensor, but I heard you have to replace the entire pedal to get that done. But if it acts up when I curve, I wonder if it's a wheel speed sensor...
Registered Member
Joined: Mar 2018
Posts: 98
Likes: 50
From: Nova
Same, same, and same!
I'm also having the same problem. The problem most definitely happens when the idle temps go up and under higher load from a stop. I've replaced the coils, plugs, air filters, and cleaned both throttle bodies. The car has improved and it reduced the frequency in occurrence, however, it does still happen every now and then. I've also noticed it happens more frequently when the AC is being used.
Those symptoms sound spot on. I'll keep an eye on this thread, or further be happy to post a solution if it's figured out. I'm dropping the car off for Clutch, flywheel, cmak, oem master cyl in a month or two. I'll ask them if they've ever encountered this as well.
Registered Member
Joined: Oct 2016
Posts: 144
Likes: 9
From: San Antonio, TX
I drive my car like I stole it but with in reason. Starting giving a ton of hesitation. Then other days it feels like a beast and I actually let off the gas. I feel its a throttle input sensor issue. Fuel related. Something of the sort.
