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Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 494
Experience:  BEng hons Mech engineering, in auto industry 22 years
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HiI have a problem with a 2003 Toyota Yaris idling too

Customer Question

I have a problem with a 2003 Toyota Yaris 1.0 petrol idling too high. When warm it's idling around 1400rpm. I bought it as a non runner and after swinging over the engine a few times I suspected a timing chain issue which when I removed the rocker cover I discovered was so loose the chain was skipping over the exhaust camshaft sprocket.
I suspected there may be valve damage but after fitting a new timing kit it fired up immediatly and runs fine. First pick of the key it starts and seems to idle smootly and drives fine with good power/accelleration
Other than high idle nothing seems amiss
Due to a noisy bearing I have changed the alternator to one from a 99 Jap built Yaris which is not exactly the same. (Had to change the pulley)
I have changed over the entire trottle body and checked that water was circulating through the little small pipes fed from the heater lines. I have changed all the sensors to no avail
It isn't bringing on the engine managment light nor is it showing up any fault codes
I'm running out of ideas and patience. Help!
Submitted: 2 years ago.
Category: Toyota
Expert:  Shantal-Mod replied 2 years ago.
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.
Thank you,