Problem with Vtec idling...varying RPM. EDIT : Solved!

gbpscars · 28th September 2007, 16:47

Quote:

Originally Posted by Shan2nu

But i generally shift at 6900-7000 so it's not that big a deal for me.

what do you mean by that? or am i missing something here?

mclaren1885 · 28th September 2007, 16:49

Quote:

Originally Posted by GTO

LOL! A third known example of this.

Maybe its because of the way you guys drive

.

GTO · 28th September 2007, 17:08

Quote:

what do you mean by that? or am i missing something here?

What he means is that, there is no useable power after 7000 rpm. So he upshifts at 6900.

hyper123 · 28th September 2007, 19:19

Quote:

Originally Posted by pgsagar

I saw this higher idling problem in my cousin's 3 day old Maruti SX4. As soon as the car is started the rpm shoots to 12-1300. After a few seconds it settles around 800. Now that's ok. It's not such a big problem. But what is very irritating is that even while driving the rpm keeps shooting every time you press clutch to change gears. It is very irritating in city driving because after changing gear when you release clutch the car just jerks forward as though it would hit the rear bumper of the car ahead. Any idea where the problem lies.

RPM shooting when you change gears may be because you are not getting off the accelerator soon enough. Try getting off the accel before you press the clutch and then see whether RPM surges.

jack7 · 28th September 2007, 20:36

Quote:

Originally Posted by Shan2nu

Same thing on my Vtec. Ever since the O2 sensor conked off, i've been able to revv past 7100. I've taken it to around 7400 without cutoff (didn't wanna go any higher).

But i generally shift at 6900-7000 so it's not that big a deal for me.

Shan2nu

I've experienced the same thing since my O2 sensor conked up too. I wasn't able to successfully find an after market place around in Bangalore to get me a replacement sensor and I haven't really noticed a real difference in the FE too.

rdkarthik · 29th September 2007, 09:42

Quote:

Originally Posted by GTO

LOL! A third known example of this.

@ rdkarthik : How?

Possibility of something else not being in spec, like shantanu said maybe an 02 sensor thats too old or off on its standard operating outputs .. This is interesting stuff, shantanu next time you get your car to bangalore i want to see it

... GTO ,shantanu and the third example, whats the manufacturing date of your cars?

GTO · 29th September 2007, 10:19

Quote:

GTO ,shantanu and the third example, whats the manufacturing date of your cars?

Mine is a 2003 with the 2nd generation ECU (No jerking etc.) while Shan2nu has a 2000 / 2001 Vtec.

iraghava · 29th September 2007, 10:42

Hmmm... looks like I'm gonna have to test mine too today to see whether it cuts-off or not. The O2 sensor in my car is also giving intermittent trouble.

Ford Rocam · 30th September 2007, 11:55

It could be Hot rev limit which is set about 400-500 rpm above cold rev limit. Cold rev limit is active till engine is fully warmed up & is active till certain conditions are not met.

Shan2nu · 30th September 2007, 12:35

Quote:

Possibility of something else not being in spec, like shantanu said maybe an 02 sensor thats too old or off on its standard operating outputs .. This is interesting stuff, shantanu next time you get your car to bangalore i want to see it ... GTO ,shantanu and the third example, whats the manufacturing date of your cars?

My car is a 2001 year model. Another thing is that for 2 days the engine check light had completely vanished. Thats when i did the 7400 rpm run. The light has been back for some time now. Need to see where the limit is as of now. Performance wise, there is no drop in power.

Shan2nu

n_aditya · 9th October 2007, 21:24

Sorry to hijack this thread GTO. I have a similar problem (almost).

On Sunday my car jerked / stalled while i was driving. To help in better understanding, it felt like riding a bike where fuel was down to reserve capacity. This happened earlier once too and the loss of power / jerking was more evident. After revving the car the problem disappeared but i noticed the rpm needle was wavering / twitching at 3000 RPM mark (i guess the term is hunting).

Is my throttle body blocked due to dust? I had got it cleaned earlier (few months back) at Electra where an aerosol container was used to spray something into the TB while revving the car. The problem vanished and has now popped up again. Any comments? Is there any DIY solution for this problem?

esteem_lover · 9th October 2007, 22:38

Mostly it is clogged TB or injectors. Get it cleaned again & make sure you fill up at the right place.

nitroxx · 10th October 2007, 00:21

check for these things o2 sensor, fitv if applicable just clean it and voila, IAC ,t.p. sensor positioning, throttle body cleaning. vaccuum leaks -

Rehaan · 11th October 2007, 03:18

Quote:

Originally Posted by n_aditya

On Sunday my car jerked / stalled while i was driving. To help in better understanding, it felt like riding a bike where fuel was down to reserve capacity.

Quite possibly a fuel pump issue too....

cya
R

v1p3r · 11th October 2007, 03:35

Just saw that big discussion on MAFs and MAPs, and the Cedia has both, unless I'm very much mistaken.

29th September 2007, 10:42	#83
iraghava Senior - BHPian Join Date: Oct 2005 Location: Bhaiyyaland Posts: 8,033 Thanked: 265 Times View My Garage	Hmmm... looks like I'm gonna have to test mine too today to see whether it cuts-off or not. The O2 sensor in my car is also giving intermittent trouble.
	() Thanks

30th September 2007, 11:55	#84
Ford Rocam BHPian Join Date: Feb 2005 Location: Mumbai-India Posts: 878 Thanked: 23 Times	It could be Hot rev limit which is set about 400-500 rpm above cold rev limit. Cold rev limit is active till engine is fully warmed up & is active till certain conditions are not met. Last edited by Ford Rocam : 30th September 2007 at 11:56.
	() Thanks

9th October 2007, 21:24	#86
n_aditya Senior - BHPian Join Date: Oct 2005 Location: Namma Bengaluru Posts: 5,348 Thanked: 3,684 Times View My Garage	Sorry to hijack this thread GTO. I have a similar problem (almost). On Sunday my car jerked / stalled while i was driving. To help in better understanding, it felt like riding a bike where fuel was down to reserve capacity. This happened earlier once too and the loss of power / jerking was more evident. After revving the car the problem disappeared but i noticed the rpm needle was wavering / twitching at 3000 RPM mark (i guess the term is hunting). Is my throttle body blocked due to dust? I had got it cleaned earlier (few months back) at Electra where an aerosol container was used to spray something into the TB while revving the car. The problem vanished and has now popped up again. Any comments? Is there any DIY solution for this problem?
	() Thanks

9th October 2007, 22:38	#87
esteem_lover Senior - BHPian Join Date: Jul 2006 Location: Madras/Py Posts: 7,556 Thanked: 502 Times View My Garage	Mostly it is clogged TB or injectors. Get it cleaned again & make sure you fill up at the right place.
	() Thanks

10th October 2007, 00:21	#88
nitroxx Awaiting Email Confirmation Join Date: Nov 2004 Location: DXB Posts: 816 Thanked: 31 Times View My Garage	check for these things o2 sensor, fitv if applicable just clean it and voila, IAC ,t.p. sensor positioning, throttle body cleaning. vaccuum leaks -
	() Thanks

11th October 2007, 03:35	#90
v1p3r Senior - BHPian Join Date: Feb 2005 Location: BLR / DXB / LON Posts: 5,334 Thanked: 6,896 Times View My Garage	Just saw that big discussion on MAFs and MAPs, and the Cedia has both, unless I'm very much mistaken.
	() Thanks