idle rpms up and down... - Toyota Yaris Forums

Pars · 05-12-2007, 04:39 AM

Occasionally, I'll notice my tach fluctuate a little at the lights while in neutral from between 400rpm to 600rpm. But it rarely happens and seems to occur when driving condition has changed, otherwise it's normally steady. Like, when I came back from a 2hr driving trip from the highway while averaging 90mph and when I was back in the city, the rpm was a little twitchy until engine got used to the more sedate city cruising.

However, fluctuating from 500rpm to 1000rpm all the time seems a little extreme. Perhaps you should try using premium fuel at a popular gas station until the car gets a good brake-in. If you haven't taken it on the highway, then opening the engine up a little on the highway might smoothen things out.

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05-12-2007, 04:39 AM	#1
Pars Drives: 07 Yaris Liftback Join Date: Aug 2006 Location: Toronto Posts: 418	Occasionally, I'll notice my tach fluctuate a little at the lights while in neutral from between 400rpm to 600rpm. But it rarely happens and seems to occur when driving condition has changed, otherwise it's normally steady. Like, when I came back from a 2hr driving trip from the highway while averaging 90mph and when I was back in the city, the rpm was a little twitchy until engine got used to the more sedate city cruising. However, fluctuating from 500rpm to 1000rpm all the time seems a little extreme. Perhaps you should try using premium fuel at a popular gas station until the car gets a good brake-in. If you haven't taken it on the highway, then opening the engine up a little on the highway might smoothen things out.