somewhat irratic idle/off-throttle - Toyota Yaris Forums

unadilla66 · 06-26-2015, 04:45 PM

07 manual HB, 103k.
The car is relatively new to me. Couple things bothering me- my idle doesn't seem very constant/consistent. It moves around between 550-650. And on the highway, say if I'm going down a long, gently hill and only have a little throttle open it seems to.....hmmm, not exactly 'surge,' and its fairly subtle, but the engine doesn't feel as smooth and consistent as it should. Anything more than around 1/4 throttle and I don't feel it. Maybe 2 separate issues, though seem like they could be connected. Ideas...?

tmontague · 06-27-2015, 05:17 AM

The idle issue is normal and can be expected from a small 4 cylinder like the 1NZ FE. As for the other issue you wrote about, i'm not sure I completely understand what the issue is

bairjo · 06-27-2015, 08:15 AM

Try cleaning the Mass Airflow Sensor. Since you didn't mention any stalling, it may or may not be the problem, but being an 07 it should be done anyhow. It is very easy to do. I would do a search on here and you may find a thread on that. Otherwise there are many videos on youtube on how to clean one on other cars.

valchrist90731 · 06-27-2015, 06:00 PM

Back battery or voltages regulator?

I had to put both in and the car feels better running at 14.6 volts compared to just running on just a almost dead battery.

06-26-2015, 04:45 PM	#1
unadilla66 Drives: '07 Yaris 3d, '12 Yaris 3d Join Date: Jun 2015 Location: ny Posts: 29	somewhat irratic idle/off-throttle 07 manual HB, 103k. The car is relatively new to me. Couple things bothering me- my idle doesn't seem very constant/consistent. It moves around between 550-650. And on the highway, say if I'm going down a long, gently hill and only have a little throttle open it seems to.....hmmm, not exactly 'surge,' and its fairly subtle, but the engine doesn't feel as smooth and consistent as it should. Anything more than around 1/4 throttle and I don't feel it. Maybe 2 separate issues, though seem like they could be connected. Ideas...?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Cleaning throttle body	ToTo	Performance Modifications	18	07-27-2011 05:20 PM
3 Drive Throttle Contoller by NTD	Sabretooth	Performance Modifications	31	10-07-2010 12:12 PM
Blitz throttle controller	808_Yaris	Performance Modifications	43	10-22-2009 04:36 AM
For Sale: 1ZZ Throttle Body and 0.25" aluminum wheel spacers	m911gt	Items for Sale by private party	6	04-25-2009 08:52 PM
toyotafest 2007	esquiva	Photo-Video-Media Gallery	36	05-15-2007 12:03 PM

06-27-2015, 05:17 AM	#2
tmontague View User's Garage Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012 Location: Caledonia Ont. Posts: 2,938	The idle issue is normal and can be expected from a small 4 cylinder like the 1NZ FE. As for the other issue you wrote about, i'm not sure I completely understand what the issue is

06-27-2015, 08:15 AM	#3
bairjo Join Date: Feb 2010 Posts: 603	Try cleaning the Mass Airflow Sensor. Since you didn't mention any stalling, it may or may not be the problem, but being an 07 it should be done anyhow. It is very easy to do. I would do a search on here and you may find a thread on that. Otherwise there are many videos on youtube on how to clean one on other cars.

06-27-2015, 06:00 PM	#4
valchrist90731 Drives: 2007 toyota yaris sedan Join Date: Jun 2015 Location: Los Angeles County Posts: 61	Back battery or voltages regulator? I had to put both in and the car feels better running at 14.6 volts compared to just running on just a almost dead battery.