Author Topic: Car's normal RPM during startup  (Read 21880 times)

Offline alangohek

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Re: Car's normal RPM during startup
« Reply #20 on: October 13, 2008, 10:10:41 AM »
Hi guys

Just curious, what is the impact of the 'shng' noise?


Offline iagree

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Re: Car's normal RPM during startup
« Reply #21 on: October 13, 2008, 12:37:15 PM »
Hi guys

Just curious, what is the impact of the 'shng' noise?


Hi all

This morning, i drive for abt 1km+ before i switch on the aircon, got abit of 'shng' noise, very soft... like the small farting sound like that...

alang, not sure the impact, but i guess it shld be 'no good' for our aircon. impact on the aircon filter shld be NIL kua. anyway, i still prefer let the engine & the 'whole body' of the car to warm up first before switch on the aircon.

but, i switch on Radio & the side mirrors almost immediately after i switch on the engine. not sure have some little impacts on the car engine or some other parts aso? anyone?

Regards.
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Offline clarence

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Re: Car's normal RPM during startup
« Reply #22 on: October 13, 2008, 01:35:11 PM »
Radio and side mirror uses battery power, so it's OK to operate them even if engine is cold.

Offline LatioR

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Re: Car's normal RPM during startup
« Reply #23 on: October 13, 2008, 10:33:30 PM »
Hi LatioR,

Ha ha.

I am in IT (Computer).

UAT = User Acceptance Test
Production = Live system environment

User performs extensive testing and then launch it (to live) and that is in the Production environment. Meaning launched for user to user liao, no longer under Testing environment.

Just to add another sentence to the above so that it is not out of topic? :)

Nowadays, i always drive for abt 3 to 4KM before i switch on the aircon, the 'shng' noise is very light... (almost NIL).

Regards.

Hi iagree, thanks for the updates..now not so alien to me liao

Offline iagree

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Re: Car's normal RPM during startup
« Reply #24 on: October 14, 2008, 12:47:52 PM »
Radio and side mirror uses battery power, so it's OK to operate them even if engine is cold.

Hello clarence,

Thanks, you are very knowledgeable. I love it.

Thanks again.
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Offline iagree

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Re: Car's normal RPM during startup
« Reply #25 on: October 14, 2008, 12:48:45 PM »
Hi iagree, thanks for the updates..now not so alien to me liao

Hi LatioR,

You are most welcome. I experienced thru extensive UAT by myself mah. So, shld be correct one. No harm sharing the experience but scare salah info aso mah then will kena scold leh.

Regards.
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Offline LatioR

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Re: Car's normal RPM during startup
« Reply #26 on: October 17, 2008, 10:07:24 PM »
hi iagree, it's Ok to share yr exp regardless u r right or wrong...no need to be so serious one lah..by the way, my idle RPM is steadily at ~900RPM (vs someone mentioning abt 800RPM)..anything need to be done to bring down the RPM (and How???, like to do it myself instead of sending to workshop)

Offline space2638

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Re: Car's normal RPM during startup
« Reply #27 on: October 17, 2008, 10:19:14 PM »
I normally wait for the "Engine Cold" light to extinguish first before switching on the aircon, but that happens when I'm already doing 90km/h on the h'way because the h'way is just behind my house... haha.. Does anyone know if switching on the A/C at h/way speeds will affect the airconditioning clutch? since everything is moving faster and the clutch connects much quicker?

 :confused1:

Offline iagree

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Re: Car's normal RPM during startup
« Reply #28 on: October 20, 2008, 08:48:30 AM »
I normally wait for the "Engine Cold" light to extinguish first before switching on the aircon, but that happens when I'm already doing 90km/h on the h'way because the h'way is just behind my house... haha.. Does anyone know if switching on the A/C at h/way speeds will affect the airconditioning clutch? since everything is moving faster and the clutch connects much quicker?

 :confused1:

Hi space2638

Oh, serious ah?
Then we shld turn on aircon before we drive fast....
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Offline iagree

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Re: Car's normal RPM during startup
« Reply #29 on: October 20, 2008, 08:50:39 AM »
hi iagree, it's Ok to share yr exp regardless u r right or wrong...no need to be so serious one lah..by the way, my idle RPM is steadily at ~900RPM (vs someone mentioning abt 800RPM)..anything need to be done to bring down the RPM (and How???, like to do it myself instead of sending to workshop)

Hi LatioR

Oh, you are right, iagree with u fully.

Ya, it is abt 800km (with gear at "D"). I am referring to the early morning when we start our engine first time of the day. I noticed when the gear is at "P", the RPM is higher.

Regards.
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Offline clarence

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Re: Car's normal RPM during startup
« Reply #30 on: October 20, 2008, 09:58:47 AM »
Hi LatioR

Oh, you are right, iagree with u fully.

Ya, it is abt 800km (with gear at "D"). I am referring to the early morning when we start our engine first time of the day. I noticed when the gear is at "P", the RPM is higher.

Regards.

You meant 800rpm?  ;)

It is normal for rpm to be higher when gear is in 'P'.

This is because the ECU sends a message to the engine to high rev (high rpm) to warm up the engine faster to achieve optimum operating temperature.

Offline LatioR

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Re: Car's normal RPM during startup
« Reply #31 on: October 29, 2008, 11:20:39 PM »
You meant 800rpm?  ;)

It is normal for rpm to be higher when gear is in 'P'.

This is because the ECU sends a message to the engine to high rev (high rpm) to warm up the engine faster to achieve optimum operating temperature.

Ya...sb 800rpm, i meant it's during idle, eg at traffic light, normally i turn to "N" while waiting...

Offline alangohek

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Re: Car's normal RPM during startup
« Reply #32 on: November 06, 2008, 04:20:10 PM »
Ya...sb 800rpm, i meant it's during idle, eg at traffic light, normally i turn to "N" while waiting...
I was told that frequent changing of gear (eg. N to D) will cause damage to the gearbox.

Personally, if I anticipate a long wait at the traffic light or any stop/ junction, I will change from D to N, to save fuel. But if it is only for a few seconds wait, I would leave it to D.

Offline SoL

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Re: Car's normal RPM during startup
« Reply #33 on: November 06, 2008, 04:32:42 PM »
Well if its those very long lights like a few minutes, its better to switch off engine. Ignition only takes about 10sec worth of fuel afterall. But make sure you're familiar with the lights and know when to switch on, or else light green le you haven't move sure tio horn!

In europe and other countries, its the law to switch off engine at long lights. Save fuel and reduce pollution. ;D

Offline iagree

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Re: Car's normal RPM during startup
« Reply #34 on: November 06, 2008, 05:32:54 PM »
You meant 800rpm?  ;)

It is normal for rpm to be higher when gear is in 'P'.

This is because the ECU sends a message to the engine to high rev (high rpm) to warm up the engine faster to achieve optimum operating temperature.

Hi clarence

sorry, yes, 800rpm :)

ohhh ,thanks
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Offline Ying

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Re: Car's normal RPM during startup
« Reply #35 on: November 06, 2008, 05:54:08 PM »
Well if its those very long lights like a few minutes, its better to switch off engine. Ignition only takes about 10sec worth of fuel afterall. But make sure you're familiar with the lights and know when to switch on, or else light green le you haven't move sure tio horn!

In europe and other countries, its the law to switch off engine at long lights. Save fuel and reduce pollution. ;D

saw some driver did that in Melaka, many traffict light have digital count down. That's help the driver to estimate when to turn off/on the engine but frequent on/off engine also no good leh. 

Offline SoL

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Re: Car's normal RPM during startup
« Reply #36 on: November 06, 2008, 07:25:20 PM »
Up to you! The money saved on petrol is definitely more than a starter thats for sure. ;D

But the worst is switch on engine AND aircon and sleep in car. Thats the money killer man! I estimate one hour burn one litre of petrol!  :crycry:

Offline LatioR

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Re: Car's normal RPM during startup
« Reply #37 on: November 07, 2008, 01:10:22 AM »
i think it's sb more than 1 L per hr one lah..if only 1L/h...worth of staying inside the car, watch DVD at $1.6+/hr (much cheaper than paying to watch at cinema rite) :devil2:... Btw, any one can help abt DIY to reduce RPM to 800 during idle? Thanks to share.

Offline Ying

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Re: Car's normal RPM during startup
« Reply #38 on: November 07, 2008, 10:45:25 AM »
I think it can be program, just ask for it during your next servicing. but you have to go TCM or those workshop what can program latio car. Not sure about DIY

Offline LatioR

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Re: Car's normal RPM during startup
« Reply #39 on: November 08, 2008, 01:22:30 AM »
hi ying, thks. shall get help from autosaver when intend to change the CVT fluid few mths later.