| View previous topic :: View next topic |
| Author |
Message |
fabia652@gmail.com
Been Around Fabiosi
Joined: 07 Dec 2011
Posts: 171
Location: Bangalore
|
 Posted: Sun Mar 10, 2013 4:44 pm Post subject: Inconsistent RPM |
 |
|
HI Guys,
Recently while i was traveling i have noticed that when ever i go over a hump or a set of multiple humps and throttle while i cross the first hump the rpm goes a bit up and down and i feel the jerks, is this common?? Is it because of traction or something i am unable to identify this?  |
|
| Back to top |
|
 |
orionph05
Been Around Fabiosi
Joined: 15 Jul 2009
Posts: 256
Location: Bangalore
|
| Posted: Wed Mar 13, 2013 8:51 am Post subject: |
|
|
I had a similar incident a coupe of years back when car refused to move in first gear and Rpm rose, it did not occur since then.
_________________
Rgds
Pravin
Bangalore |
|
| Back to top |
|
|
admin
Site Admin
Joined: 04 Jun 2009
Posts: 692
Location: Bengaluru
|
| Posted: Fri Mar 15, 2013 12:03 pm Post subject: Re: Inconsistent RPM |
|
|
| fabia652@gmail.com wrote: | HI Guys,
Recently while i was traveling i have noticed that when ever i go over a hump or a set of multiple humps and throttle while i cross the first hump the rpm goes a bit up and down and i feel the jerks, is this common?? Is it because of traction or something i am unable to identify this? |
I am assuming you were in 1st gear. It is normal. the ECU adjusts the rpm to avoid stalling and hence the jerks. The first gear is rarely smooth in any car.
I avoid it by pressing the clutch completely till the humps are crossed.
_________________
Robin |
|
| Back to top |
|
|
fabia652@gmail.com
Been Around Fabiosi
Joined: 07 Dec 2011
Posts: 171
Location: Bangalore
|
| Posted: Sun Mar 17, 2013 10:54 am Post subject: Re: Inconsistent RPM |
|
|
| admin wrote: | | fabia652@gmail.com wrote: | HI Guys,
Recently while i was traveling i have noticed that when ever i go over a hump or a set of multiple humps and throttle while i cross the first hump the rpm goes a bit up and down and i feel the jerks, is this common?? Is it because of traction or something i am unable to identify this? |
I am assuming you were in 1st gear. It is normal. the ECU adjusts the rpm to avoid stalling and hence the jerks. The first gear is rarely smooth in any car.
I avoid it by pressing the clutch completely till the humps are crossed. |
Yes i was in the 1st gear while crossing the hump, will keep in neutral while crossing the hump thanks for the info, I find this kind of issue does not come up in my hyundai I10, strange but let me check again. |
|
| Back to top |
|
|
admin
Site Admin
Joined: 04 Jun 2009
Posts: 692
Location: Bengaluru
|
| Posted: Mon Mar 18, 2013 10:30 am Post subject: Re: Inconsistent RPM |
|
|
| fabia652@gmail.com wrote: | | admin wrote: | | fabia652@gmail.com wrote: | HI Guys,
Recently while i was traveling i have noticed that when ever i go over a hump or a set of multiple humps and throttle while i cross the first hump the rpm goes a bit up and down and i feel the jerks, is this common?? Is it because of traction or something i am unable to identify this? |
I am assuming you were in 1st gear. It is normal. the ECU adjusts the rpm to avoid stalling and hence the jerks. The first gear is rarely smooth in any car.
I avoid it by pressing the clutch completely till the humps are crossed. |
Yes i was in the 1st gear while crossing the hump, will keep in neutral while crossing the hump thanks for the info, I find this kind of issue does not come up in my hyundai I10, strange but let me check again. |
Or it could be also because of increase of speed while going down the hump - increasing the rpm. while going up - decreasing the rpm due to decreasing speed. simpler logic 
Different cars will behave differently. I have driven the Dzire and A star , both having a more jerky first gear in general - a maruti style may be. Haven't tried on the rumble hump though.
_________________
Robin |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
