View Poll Results: Do you feel any engine vibrations at low RPM with your NX 200t?
Yes. Often
27
20.93%
Yes. Sometimes
41
31.78%
No. Not at all
61
47.29%
Voters: 129. You may not vote on this poll
NX 200t Owner Survey - Engine Vibration Poll
10-11-16, 04:52 PM
#123
The pursuit of F
Hmmm... interesting comments. If the winter blend is available that early, then my thought on the air temp may not be it and could be the winter blend. Back to the drawing board!
10-13-16, 03:18 AM
#124
10-17-16, 03:56 AM
#125
Yes winter blends start being made on September 15th doesn't mean your station or all stations are switched over. Especially with higher octane blends that have less sales. Try another station if you frequent the same one. Try a 93 octane or mix 89 and 91.....anything to see if it's fuel. Vibrations are tricky and never just accept they all do it crap. Mine doesn't do it.
-The national average price for unleaded gasoline is expected to keep moving lower as we head into fall barring any unexpected disruptions in supply or spikes in the price of crude oil. Pump prices typically decline during this time of year due to lower driving demand after the busy summer driving season has concluded and the changeover from summer-blend to a cheaper-to-produce winter-blend gasoline, which takes place in many parts of the country starting on September 15.
The difference between summer- and winter-blend gasoline involves the Reid Vapor Pressure (RVP) of the fuel. RVP is a measure of how easily the fuel evaporates at a given temperature. The more volatile a gasoline (higher RVP), the easier it evaporates.-
Winter-blend fuel has a higher RVP because the fuel must be able to evaporate at low temperatures for the engine to operate properly, especially when the engine is cold. If the RVP is too low on a frigid day, the vehicle will be hard to start and once started, will run rough.
Last edited by Tom59; 10-17-16 at 03:59 AM.
10-17-16, 06:26 AM
#126
Rookie
Thread Starter
Join Date: May 2015
Location: CT
Posts: 88
Likes: 0
Received 0 Likes
on
0 Posts
All turbo'd engines prefer cold dense air.......
Yes winter blends start being made on September 15th doesn't mean your station or all stations are switched over. Especially with higher octane blends that have less sales. Try another station if you frequent the same one. Try a 93 octane or mix 89 and 91.....anything to see if it's fuel. Vibrations are tricky and never just accept they all do it crap. Mine doesn't do it.
-The national average price for unleaded gasoline is expected to keep moving lower as we head into fall barring any unexpected disruptions in supply or spikes in the price of crude oil. Pump prices typically decline during this time of year due to lower driving demand after the busy summer driving season has concluded and the changeover from summer-blend to a cheaper-to-produce winter-blend gasoline, which takes place in many parts of the country starting on September 15.
The difference between summer- and winter-blend gasoline involves the Reid Vapor Pressure (RVP) of the fuel. RVP is a measure of how easily the fuel evaporates at a given temperature. The more volatile a gasoline (higher RVP), the easier it evaporates.-
Winter-blend fuel has a higher RVP because the fuel must be able to evaporate at low temperatures for the engine to operate properly, especially when the engine is cold. If the RVP is too low on a frigid day, the vehicle will be hard to start and once started, will run rough.
Yes winter blends start being made on September 15th doesn't mean your station or all stations are switched over. Especially with higher octane blends that have less sales. Try another station if you frequent the same one. Try a 93 octane or mix 89 and 91.....anything to see if it's fuel. Vibrations are tricky and never just accept they all do it crap. Mine doesn't do it.
-The national average price for unleaded gasoline is expected to keep moving lower as we head into fall barring any unexpected disruptions in supply or spikes in the price of crude oil. Pump prices typically decline during this time of year due to lower driving demand after the busy summer driving season has concluded and the changeover from summer-blend to a cheaper-to-produce winter-blend gasoline, which takes place in many parts of the country starting on September 15.
The difference between summer- and winter-blend gasoline involves the Reid Vapor Pressure (RVP) of the fuel. RVP is a measure of how easily the fuel evaporates at a given temperature. The more volatile a gasoline (higher RVP), the easier it evaporates.-
Winter-blend fuel has a higher RVP because the fuel must be able to evaporate at low temperatures for the engine to operate properly, especially when the engine is cold. If the RVP is too low on a frigid day, the vehicle will be hard to start and once started, will run rough.
10-17-16, 08:54 AM
#127
Thinking this through, let me know if this makes sense. If the local stations have not switched to winter blend, and we have some cold days, the car may run rougher since the RVP is too low in a summer blend? Am I thinking correctly? That would certainly explain why its worse at present...
You would get ever better gas mileage and better performance during the cold weather season if they sold summer blend gas. But it's all about money.
10-24-16, 05:15 AM
#128
Thinking this through, let me know if this makes sense. If the local stations have not switched to winter blend, and we have some cold days, the car may run rougher since the RVP is too low in a summer blend? Am I thinking correctly? That would certainly explain why its worse at present...
So many variables..........
11-30-16, 11:44 PM
#129
I sense vibration when the car is stopped uphill at a light, no brake hold, just foot on the brake. I suspect it's due to the computer compensating (slightly raising RPM) for uphill start roll back when the brakes are released.
12-02-16, 10:48 AM
#131
New '17 with 300 miles and there is definitely a small vibration when stopped at a stop light and even more so when I take my foot off the gas to accelerate from a stop. Nothing to obnoxious, & no where close to the vibration our Kia Soul has.... unfortunately, I think it's the nature of the beast with a 4 banger under the hood....
04-12-17, 04:50 PM
#132
Driver School Candidate
Join Date: Apr 2017
Location: CA
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
let me see if i can describe the issue. If i am at a light with the brake applied the car feels fine. as soon as i let my foot off the brake (not touching the accelerator yet) the car starts vibrating. If i reapply the brake it goes away. It doesnt matter if the road is flat, incline, decline. it also doesnt seem to matter what accessories are running. is this something others experience and/or is it something the dealer needs to figure out?
work sheet reads: Reprogram PCM per service bulletin
04-12-17, 07:18 PM
#135
Rookie
Thread Starter
Join Date: May 2015
Location: CT
Posts: 88
Likes: 0
Received 0 Likes
on
0 Posts