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11-07-2018, 11:52 PM
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#1 |
 Drives: 2009 Yaris Join Date: Mar 2011
Location: The Last Best Place
Posts: 23
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2009 Yaris erratic idle
Occasionally my Yaris seems to want to low idle around 500. Ideas?
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11-08-2018, 08:23 AM
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#2 |
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Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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Toyota Tachometer
What is measuring this rpm? Just the arm arm on the OEM dial tachometer in the instrument cluster? (I don't have tach option, so don't know if there is a digital readout.)
Is car auto or manual? In what gear positions is 500 rpm idle? |
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11-08-2018, 08:25 AM
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#3 |
 
Drives: No longer own a yaris :( Join Date: Mar 2012
Location: Ashland, VA
Posts: 680
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Do you have a CEL?
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11-11-2018, 05:27 PM
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#4 |
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Drives: 2009 Yaris Join Date: Mar 2011
Location: The Last Best Place
Posts: 23
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Analog tach goes down and I can feel the engine dropping rpm. It’s a stick. Notice it stopped in neutral.
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11-11-2018, 05:47 PM
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#5 |
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Drives: 2010 3dr LB Join Date: Sep 2010
Location: SE Mass
Posts: 89
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I have a 2010, 140,000 mile, manual trans, that does the same, has done it since new. Bill C
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11-12-2018, 08:23 AM
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#6 |
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Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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Normal is only 600 rpm. Feels slow compared to 91 manual 1600 Corolla 750 spec rpm.
Can see 100 rpm on gauge that swings to? 8000? |
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11-13-2018, 08:32 AM
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#7 |
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Drives: No longer own a yaris :( Join Date: Mar 2012
Location: Ashland, VA
Posts: 680
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I can say that the idle in my 08 manual hatch has always been....asynchronous? It tends to drop and then rise every few seconds, but never low enough to where it feels like it's going to stall. I drove another yaris a few years ago that did the same thing.
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11-13-2018, 08:38 PM
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#8 |
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Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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Toyota Yaris low hunting erratic idle Corolla timing
The 1991 Corolla 4A-FE has a hunting spark advance at idle...you can hear it in the stock intake. To check timing, you place an electrical shunt somewhere so the idle timing stays in one place. Mind of Toyota.
(Consistent w/ factory shop manual. I think hunting can be a way to optimize some tuning parameter(s).) I think my Yaris idle is pretty steady. Cooling fan and/or A/C cycling, and maybe alternator voltage regulation, could cause idle fluctuation. |
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11-14-2018, 05:59 AM
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#9 | |
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Drives: 08 Sedan Join Date: Oct 2008
Location: Toronto
Posts: 301
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Clean your MAF sensor and then pull you battery cable for 1 min and reisntall
Quote:
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11-14-2018, 01:49 PM
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#10 | |
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Banned
Drives: 2015 Yaris LE 3door 1F7 Join Date: Feb 2017
Location: Massachusetts
Posts: 963
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Quote:
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11-14-2018, 02:35 PM
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#11 |
Drives: 06 Polar White 5dr, 13 Soul 4u Join Date: Oct 2008
Location: Georgetown, Ontario, Canada
Posts: 5,740
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By the needle, warm engine, mine idles 500 rpm on the nose.
Sent from my EML-L09 using Tapatalk
__________________
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11-15-2018, 12:50 PM
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#12 |
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Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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Toyota Yaris idle speed
Using pin 8 (or 9?) on Hal's 16 pin OBD connector, and a ground to a mid level digital multimeter set on "frequency," my 2007 manual Yaris warmed up would, and may still, idle at 600 rpm...exactly 600.
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