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01-27-2010, 11:51 AM | #1 |
Drives: 2010 Hatchback Join Date: Jan 2010
Location: Denver
Posts: 9
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Fluctuating RPM
After the engine is warmed up and in idle the RPM continuously cycles between 400 and 600. It will be running smooth at 600, then the RPM drops to 400, where it runs rough for a few seconds, then the RPM increases to 600 where it runs smooth for a few seconds, etc. It has done this since the car was new. Is this normal?
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01-27-2010, 02:53 PM | #2 |
Drives: Vitz RS Turbo Join Date: Nov 2008
Location: ML
Posts: 576
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What engine do you own?
Could you set the idling to 800-1000. 600rpm seems too low for me " It has done this since the car was new " Why don't you ask the dealer that sold you the car in the first place? |
01-27-2010, 03:24 PM | #3 |
Drives: 08 3DR 5M Bayou Blue; 09 Fos Join Date: Oct 2008
Location: New Hampshire
Posts: 622
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It does this when charging or under load with heater/ ac or radio headlifghts. Normal but suboptimal. AFIK nothing correctable.
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01-27-2010, 09:04 PM | #4 |
It's just how toyota tunes these cars to get as much gas mileage as possible. It is normal.
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01-27-2010, 09:34 PM | #5 |
I love momentum.
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Normal, mine does it too from time to time.
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01-28-2010, 09:13 AM | #6 |
Drives: 2010 Hatchback Join Date: Jan 2010
Location: Denver
Posts: 9
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OK, I thought it could be normal. It's like the engine is seeking to burn as little gas as possible.
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01-28-2010, 09:49 AM | #7 |
Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009
Location: Angus, Ontario
Posts: 1,891
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i have posted a similar problem also. mine idles at 500 rpm then will jump to 800rpm (ish) and then drop down. at first thought it was the a/c kicking in so i turned everything off and it still does it. look under the hood and watch, i noticed as soon as it jumps up the rpm the fan will kick in and when it goes back down the fan turns off.....
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If it has boobs or wheels sooner or later your gonna have problems with it |
02-05-2010, 02:45 PM | #8 |
Drives: 08 3DR 5M Bayou Blue; 09 Fos Join Date: Oct 2008
Location: New Hampshire
Posts: 622
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Operating with any partial or Defrost On setting on air director with fan at 1 or higher = AC on; regardless of ac switch on or not. I think.
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02-06-2010, 12:54 PM | #9 |
Your mom goes to college
Drives: 08 Vitz Join Date: Oct 2008
Location: Just chillin' out brah !
Posts: 1,434
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^^ +2
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Garm is permanently high because he is the king of smokin' deals! |
02-07-2010, 08:53 PM | #10 |
Only Happy When it Rains
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mine has always done it. it's normal.
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Colin Chapman disciple |
02-28-2010, 02:47 PM | #11 |
Drives: 2007 Yaris 4d Sedan Join Date: Feb 2010
Location: CO
Posts: 28
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Mine does this too - exactly how u say. Stays at 600 and then drops to sub 500 rpms, except my car shutters slightly when it does this. Should I up my idle rpm to say, 700?
Nvm i guess you can't since its electronic - guess i just have to live with it :( |
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