Singapore Nissan Owners Group
Nissan Car Lounge - Almera, Juke, Latio, Qashqai, Sylphy, Teana Owners => Latio => Topic started by: Whiteraven on October 02, 2008, 05:26:48 PM
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Hello Guys,
I'm a first time car owner, need some help on some RPM thingy.
During a cold engine startup, my car's RPM ramped up to about 1500rpm and stayed there until i shifted the gear from P to D.
I was waiting for the blue cold light to go off before my drive.
Is this normal? Just collected my car btw.
Thanks in advance.
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Hello Guys,
I'm a first time car owner, need some help on some RPM thingy.
During a cold engine startup, my car's RPM ramped up to about 1500rpm and stayed there until i shifted the gear from P to D.
I was waiting for the blue cold light to go off before my drive.
Is this normal? Just collected my car btw.
Thanks in advance.
It's normal. Mine rev to around 1600. Not necessary to wait for the blue light to go off before driving off.
Normally I will wait for around 20 secs before drive off. By then the RPM should drop to around 1200 - 1400 RPM. This 20 secs allows the engine oil to "circulate". When the blue light is on, I will drive like a tortoise. Haha =)
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Hello Guys,
I'm a first time car owner, need some help on some RPM thingy.
During a cold engine startup, my car's RPM ramped up to about 1500rpm and stayed there until i shifted the gear from P to D.
I was waiting for the blue cold light to go off before my drive.
Is this normal? Just collected my car btw.
Thanks in advance.
Very normal..no worries about if.
BTW, welcome to The Latio Club and enjoy your ride.
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It's normal. Mine rev to around 1600. Not necessary to wait for the blue light to go off before driving off.
Normally I will wait for around 20 secs before drive off. By then the RPM should drop to around 1200 - 1400 RPM. This 20 secs allows the engine oil to "circulate". When the blue light is on, I will drive like a tortoise. Haha =)
Yup! Same here. When blue light is on, i slowly crawl down my MSCP without touching the accelerator... :w00t:
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Thanks for the replies guys~ :w00t:
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Hello
I think is abt 2000rpm but it shld be hitting that rpm for abt 1 to 2 seconds after you startup, then it will reduce to abt 1500rpm.
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When engine is cold, rpm metre is higher (ranges from 1,000rpm to 1,600rpm, depending on car model) as all cars are electronically tuned to have higher rpm during cold start to warm up the engine.
When engine has reached optimium operating temperature, which is about 5 mins after you start your engine, rpm at idle should be 800rpm for optimium fuel economy.
If your engine is already warmed up and the rpm is above 800rpm at idle, it is drinking more petrol than necessary.
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When engine is cold, rpm metre is higher (ranges from 1,000rpm to 1,600rpm, depending on car model) as all cars are electronically tuned to have higher rpm during cold start to warm up the engine.
When engine has reached optimium operating temperature, which is about 5 mins after you start your engine, rpm at idle should be 800rpm for optimium fuel economy.
If your engine is already warmed up and the rpm is above 800rpm at idle, it is drinking more petrol than necessary.
Hi clarence
iagree with u.
1) 2000rpm+ when start in the morning
2) 1 to 2 seconds after, it will reduce to 1500rpm + -
3) 1 to 2min later (before we drive off the car), it will maintain at around 800 rpm.
Regards.
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think if u start ur car withthe air con running, teh rpm will be slightly higher coz the compressor sapping lotsa power.. engine need to work harder :crying:
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Yes, engine will also be noisier and fuel gauge needle drops faster too.
You will notice lack of power when driving off during cold start with air con turned on.
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think if u start ur car withthe air con running, teh rpm will be slightly higher coz the compressor sapping lotsa power.. engine need to work harder :crying:
Hi kanzo
I have the same +ve habit , i.e. to off the aircon, off the lights, off the radio+players before i switch off the engine. the rpm shld be normal. good ones u hv share out. thanks.
Yes, engine will also be noisier and fuel gauge needle drops faster too.
You will notice lack of power when driving off during cold start with air con turned on.
Hi clarence,
Good idea. I always drive for abt 2km to 3km before i switch on the aircon. When i switch on the aircon, it has a "shnggg" sound... like farttting...
Regards.
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Hi kanzo
I have the same +ve habit , i.e. to off the aircon, off the lights, off the radio+players before i switch off the engine. the rpm shld be normal. good ones u hv share out. thanks.
Hi clarence,
Good idea. I always drive for abt 2km to 3km before i switch on the aircon. When i switch on the aircon, it has a "shnggg" sound... like farttting...
Regards.
I've the sound too.
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That sound when you start the air con should benormal but if it persists after your air con is turned on, then there are some faults with your air con.
Some Lations here experienced this problem, sent their Latios bk to Tan Chong and got their air con compressor replaced.
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I've the sound too.
Hi arias,
I noticed, if you drive for longer distance before you switch on the aircon, the 'shnnng' snd is very very soft.... almost cannot hear it.... Try to drive until the car is fully warmed up... may be 3 to 5 km after u drive off ?
Regards.
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Hi arias,
I noticed, if you drive for longer distance before you switch on the aircon, the 'shnnng' snd is very very soft.... almost cannot hear it.... Try to drive until the car is fully warmed up... may be 3 to 5 km after u drive off ?
Regards.
Okay, will try that. But I usually turn on the aircon in MSCP, so the sound is very obvious in the enclose MSCP. If I drive 3 to 5 km away, I'll probably ended up on the main road, more noises from the surroundings, maybe hard to hear the sound. But anyway I will try that. THX.
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Okay, will try that. But I usually turn on the aircon in MSCP, so the sound is very obvious in the enclose MSCP. If I drive 3 to 5 km away, I'll probably ended up on the main road, more noises from the surroundings, maybe hard to hear the sound. But anyway I will try that. THX.
Hi arias,
Close all windows b4 u switch on the aircon, u will be able to hear clearly.
You will feel a great diff.
No worry, i tested before. An extensive UAT has been done by me for this issue :)
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Hi arias,
Close all windows b4 u switch on the aircon, u will be able to hear clearly.
You will feel a great diff.
No worry, i tested before. An extensive UAT has been done by me for this issue :)
How many users have sign-off ur UAT? :D :D Will try that and feedback, thx...
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How many users have sign-off ur UAT? :D :D Will try that and feedback, thx...
Hi arias,
4 Senior Manager + 1 MD + 1 DMD had signed off the UAT.
It's proven and workable in production environment.
Cheers.
-iagree
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Hi arias,
4 Senior Manager + 1 MD + 1 DMD had signed off the UAT.
It's proven and workable in production environment.
Cheers.
-iagree
Hi iagree, what's UAT (sorry as it's new to me)? U r in production line? If yes, what kind of mfg u r in?
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Hi iagree, what's UAT (sorry as it's new to me)? U r in production line? If yes, what kind of mfg u r in?
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.
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Hi guys
Just curious, what is the impact of the 'shng' noise?
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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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Radio and side mirror uses battery power, so it's OK to operate them even if engine is cold.
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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
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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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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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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)
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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:
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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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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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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.
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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...
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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.
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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
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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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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.
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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:
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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.
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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
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hi ying, thks. shall get help from autosaver when intend to change the CVT fluid few mths later.