Okay Auto Ags, you know stuff! Maybe we can figure out this problem.
Vehicle is a 2017 Infiniti Q50 Sport. Bought it in 2020 CPO with 30k miles on it. CPO warranty is up in February. Generally speaking it has been a great car with no big unexpected issues. Now at 105k miles.
So, the mystery issue. In the summer of 2023 with with around 70k miles this came up for the first time. Since then it has happened maybe 12 times. Have taken it into the dealer multiple times, including once where I drove it straight there while the issue was active (it typically goes away after a couple restarts.) They have tried multiple things, some covered by warranty, some at my expense and haven't fixed it.
Start the car after driving somewhere and it has basically no throttle response. It goes, but has no power (typically a pretty powerful engine - 3.0 twin turbo). The shift points are all messed up. Revs up to 5k before shifting. You can pump the accelerator and nothing really happens. There is a delay from pushing the accelerator down and the engine revving. It drives, but not well. Putting it in manual shifting mode doesn't help and the shifting is still l****.
The first time it happened I planned to take it directly to the dealer but stopped at home to clear out my work stuff and turned it off. Got back in to go and realized it was acting normal. From then it happens randomly. Since I figured out that turning it off seems to reset it, most of the time I just do that. As stated, I have had it into the dealer multiple times for it, including once where I drove straight there and did not turn it off so the tech could drive it and see the problem. Have not been able to really figure out any common factors. But here are the things I have noted.
Does not appear weather related - happens in hot and cold weather.
Has never happened first thing in the morning. Usually it will be midday. For my job I drive to multiple appointments with a couple hours at each. So it will happen when started after one of those appointments.
Had said it never happened while it was running/while driving. But yesterday that actually changed. It happened while driving after about 30 minutes on the highway. While sitting at the light after the offramp, it popped up for the rest of the drive home. Of course it was fine this morning when I took it in.
Has never gone away without turning it off. Does seem that it has to be turned off multiple times to "reset" it as it has progressed.
Does not appear that it throws any error codes when it happens. After the time I took it in while the problem was active they replaced a sensor and checked the turbos and stuff. (the turbos got replaced separately in July when they went out - that threw all kinds of error codes.) Never really thought it was the turbos because of the intermittent nature.
Typically they say they cannot recreate and they don't know what it is. Last time it was in they found the ECM and TCM were out of date and suggested updating them (not covered by warranty for some stupid reason.) But I paid to do it. Apparently that wasn't it.
Before the turbos were replaced I had planned to get rid of the car soon despite really liking it because of the high cost to replace them compared to the value of the car. But changed that plan when they got replaced and went ahead with various maintenance stuff. Now I am pissed because of putting a few thousand in maintenance into it thinking things were good. But still having this mystery problem. Heck, if I knew it would always be intermittent and go away, I would not really care. But if it gets worse and doesn't go away, I don't want to be stuck.
I would like to pass the car on to my daughter to finish out college. It updates her current car by a few years and 70k miles. But this mystery problem worries me. Particularly since it seems to be slowly getting worse.
Any ideas?
Vehicle is a 2017 Infiniti Q50 Sport. Bought it in 2020 CPO with 30k miles on it. CPO warranty is up in February. Generally speaking it has been a great car with no big unexpected issues. Now at 105k miles.
So, the mystery issue. In the summer of 2023 with with around 70k miles this came up for the first time. Since then it has happened maybe 12 times. Have taken it into the dealer multiple times, including once where I drove it straight there while the issue was active (it typically goes away after a couple restarts.) They have tried multiple things, some covered by warranty, some at my expense and haven't fixed it.
Start the car after driving somewhere and it has basically no throttle response. It goes, but has no power (typically a pretty powerful engine - 3.0 twin turbo). The shift points are all messed up. Revs up to 5k before shifting. You can pump the accelerator and nothing really happens. There is a delay from pushing the accelerator down and the engine revving. It drives, but not well. Putting it in manual shifting mode doesn't help and the shifting is still l****.
The first time it happened I planned to take it directly to the dealer but stopped at home to clear out my work stuff and turned it off. Got back in to go and realized it was acting normal. From then it happens randomly. Since I figured out that turning it off seems to reset it, most of the time I just do that. As stated, I have had it into the dealer multiple times for it, including once where I drove straight there and did not turn it off so the tech could drive it and see the problem. Have not been able to really figure out any common factors. But here are the things I have noted.
Does not appear weather related - happens in hot and cold weather.
Has never happened first thing in the morning. Usually it will be midday. For my job I drive to multiple appointments with a couple hours at each. So it will happen when started after one of those appointments.
Had said it never happened while it was running/while driving. But yesterday that actually changed. It happened while driving after about 30 minutes on the highway. While sitting at the light after the offramp, it popped up for the rest of the drive home. Of course it was fine this morning when I took it in.
Has never gone away without turning it off. Does seem that it has to be turned off multiple times to "reset" it as it has progressed.
Does not appear that it throws any error codes when it happens. After the time I took it in while the problem was active they replaced a sensor and checked the turbos and stuff. (the turbos got replaced separately in July when they went out - that threw all kinds of error codes.) Never really thought it was the turbos because of the intermittent nature.
Typically they say they cannot recreate and they don't know what it is. Last time it was in they found the ECM and TCM were out of date and suggested updating them (not covered by warranty for some stupid reason.) But I paid to do it. Apparently that wasn't it.
Before the turbos were replaced I had planned to get rid of the car soon despite really liking it because of the high cost to replace them compared to the value of the car. But changed that plan when they got replaced and went ahead with various maintenance stuff. Now I am pissed because of putting a few thousand in maintenance into it thinking things were good. But still having this mystery problem. Heck, if I knew it would always be intermittent and go away, I would not really care. But if it gets worse and doesn't go away, I don't want to be stuck.
I would like to pass the car on to my daughter to finish out college. It updates her current car by a few years and 70k miles. But this mystery problem worries me. Particularly since it seems to be slowly getting worse.
Any ideas?
