Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 5th November 2008, 11:21   #1
BHPian
 
Join Date: Oct 2008
Location: Indirapuram, Ghaziabad
Posts: 69
Thanked: 0 Times
Default Car moves forward without pressing the accelerator ...normal?

Hi,
I recently got myself a SWIFT LDI. I noticed that in any gear, if I just take my foot off the clutch and do not press the accelerator, the cars till moves forward at a slow speed. Is this normal?

Does this also mean that if i am standing on a climbing slope with engine started, and need to move on, then I can simply take off my foot off the clutch and break, without the worry of the car rolling back?
skumar69 is offline   Reply With Quote
Old 5th November 2008, 13:05   #2
Awaiting Email Confirmation
 
Join Date: Sep 2007
Location: India
Posts: 1,745
Thanked: 19 Times
Default

its normal, in fact, if it doesnt, you should be worried. its a useful feature in traffic.
and yes, the car will climb without use of the accelerator up some serious inclines if the surface is smooth and provides enough traction.

You always should worry about the car rolling back, and be prepared for it. the car wont, not normally, but its best not to get caught out.
rippergeo is offline   Reply With Quote
Old 5th November 2008, 13:06   #3
Team-BHP Support
 
Eddy's Avatar
 
Join Date: Apr 2007
Location: Delhi
Posts: 7,400
Thanked: 4,674 Times
Default

Absolutely normal. Enjoy the bumper to bumper traffic.
Eddy is offline   Reply With Quote
Old 5th November 2008, 13:42   #4
BHPian
 
HotChillyPepper's Avatar
 
Join Date: Jan 2006
Location: Bang_a_lore
Posts: 605
Thanked: 215 Times
Default

Quote:
Originally Posted by skumar69 View Post
Hi,
I recently got myself a SWIFT LDI. I noticed that in any gear, if I just take my foot off the clutch and do not press the accelerator, the cars till moves forward at a slow speed. Is this normal?
Go Shipra mall. Park your car there for 3 hours and try again.
HotChillyPepper is offline   Reply With Quote
Old 5th November 2008, 13:49   #5
BHPian
 
srikant's Avatar
 
Join Date: Jul 2008
Location: Bengaluru
Posts: 488
Thanked: 9 Times
Default

Thats like that on most cars, it used to be same on higher cars from Maruti ESTEEM upwards pal. I had this same first time experience on an ESTEEM way back in 2000. But later learnt it to be normal. Enjoy the car pal.
srikant is offline   Reply With Quote
Old 5th November 2008, 13:49   #6
BHPian
 
Join Date: Sep 2007
Location: NA
Posts: 769
Thanked: 49 Times
Default

It is so common in diesel cars due to low end torque. Even my Indica DLS used to move on releasing the clutch. Yes, on slopes, it used to be a charm.
opendro is offline   Reply With Quote
Old 5th November 2008, 13:50   #7
BHPian
 
mail4loys's Avatar
 
Join Date: Nov 2006
Location: San Antonio, TX
Posts: 375
Thanked: 6 Times
Default

its very normal. Once when my friend wanted to drive my car (that time he didnt know how to drive) instructed him not to touch accelerator and made him drive on first gear for couple of minutes without using the accelerator.
mail4loys is offline   Reply With Quote
Old 5th November 2008, 13:58   #8
Senior - BHPian
 
esteem_lover's Avatar
 
Join Date: Jul 2006
Location: Madras/Py
Posts: 7,554
Thanked: 445 Times
Default

All diesels do this. Some of the later petrol mpfis too do this. In petrol, it is just that the idling speed is at a little higher RPM.
esteem_lover is offline   Reply With Quote
Old 5th November 2008, 14:17   #9
BHPian
 
Swifty2008's Avatar
 
Join Date: Oct 2008
Location: Pune
Posts: 236
Thanked: Once
Default

This is perfectly normal. No need to worry.
Swifty2008 is offline   (1) Thanks Reply With Quote
Old 5th November 2008, 14:55   #10
BHPian
 
Join Date: Aug 2006
Location: Mumbai
Posts: 384
Thanked: 7 Times
Default

I too had not noticed that without using the accelerator I can move my Swift until recently when a friend informed me about this feature in MPFI vehicles. You put the vehicle in 1st or reverse and lift the foot half way on the clutch. Now use this regularly for getting out of my building parking and also in stop-start traffic !!
emkay456 is offline   Reply With Quote
Old 5th November 2008, 15:08   #11
BHPian
 
Shashank.A's Avatar
 
Join Date: Sep 2007
Location: New Delhi
Posts: 479
Thanked: Once
Default

Quote:
Originally Posted by emkay456 View Post
about this feature in MPFI vehicles.
Nothing to do with MPFI, my Carb Esteem has it.

With the AC switched on, its more prominent, as the RPM increases.

And I guess it will be there in all cars, because even at idle position the engine does work, and once the gear is engaged and you disengage the clutch, then vehicle is supposed to move.

You can even change the gears, and it actually increases speeds. I have have around 30kmph on 3rd gear, without using accelerator.
Shashank.A is offline   Reply With Quote
Old 5th November 2008, 15:22   #12
Distinguished - BHPian
 
Technocrat's Avatar
 
Join Date: Feb 2004
Location: Mid West
Posts: 14,896
Thanked: 2,477 Times
Default

On a carb engine?????

Must be set to rev at higher rpms
Technocrat is offline   (1) Thanks Reply With Quote
Old 5th November 2008, 16:17   #13
Senior - BHPian
 
wanderernomad's Avatar
 
Join Date: Jul 2007
Location: Chandigarh
Posts: 2,390
Thanked: 785 Times
Default

I at times go around my campus in 2nd gear without using the gas pedal. As you continue upshifting the speed also increases. But then ofcourse I drive a Diesel.
wanderernomad is offline   Reply With Quote
Old 5th November 2008, 16:22   #14
Team-BHP Support
 
Rehaan's Avatar
 
Join Date: Feb 2004
Location: Bombay
Posts: 22,364
Thanked: 22,568 Times
Default

Quote:
Originally Posted by rippergeo View Post
...the car will climb without use of the accelerator up some serious inclines if the surface is smooth and provides enough traction.....
Traction isnt really an issue in this case IMO.
I would say it depends on the torque available from your engine at idle RPM, as well as how low the gearing is. (Not to mention the speed its set to idle at == torque available).

Deisels have much better low-end torque, and hence can lug much better in situations like this.

Also, you need to let go of the clutch fairly slowly to prevent stalling.

Quote:
Originally Posted by Shashank.A View Post
Nothing to do with MPFI, my Carb Esteem has it....
Well the MPFI has the advantage of the ECU sensing load and hence accomodating for it (slightly more power without pressing the accelerator).

cya
R

Last edited by Rehaan : 5th November 2008 at 16:25.
Rehaan is offline   Reply With Quote
Old 5th November 2008, 17:04   #15
BHPian
 
shuvadips's Avatar
 
Join Date: Jul 2008
Location: Bangalore
Posts: 120
Thanked: 3 Times
Default

Yeh its perfectly normal, I remember when my driving school instrutor told me so, I was so surprised.

I thought its just like the bikes whenre to make it move from stationary you need to release the clutch slowly & press the accelerator slowly in a synchronous way.
shuvadips is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Registration of a new car without any broker(without paying bribe) in Noida hdi_pro Indian Car Loans & Insurance 56 23rd March 2017 20:40
Shifting to Neutral or Pressing the Clutch when Braking - Is this right? netarchie Technical Stuff 412 2nd June 2016 22:18
Palio 1.2 nv - Pressing the clutch pedal while starting the car kapilsharma80 Technical Stuff 24 18th February 2013 22:12
cheen-cheen-cheen noise when pressing accelerator vebmetal Technical Stuff 15 27th August 2008 13:33


All times are GMT +5.5. The time now is 04:37.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks