my car's rpm fluctuates on idle between 0.3k-1k. engine makes extra noise

Asked by Dec 11, 2014 at 01:53 PM about the 2008 Toyota Corolla

Question type: Maintenance & Repair

hi friends, i have corolla 2008. my car's rpm fluctuates on idle between 0.3k-1k. engine
makes extra noise. sluggish when going above 40km/h in 2nd gear . low pick and low
power. changed plugs, throttle body cleaning but same problem exists and their is no
engine check light on running engine. what is the possible problem?

4 Answers

35,725

Did you also clean your IAC? (Idle Air Control Valve) If so and no results, you may need to replace it. Here's a short video: https://www.youtube.com/watch?v=mfauGoGXCmo

6 out of 6 people think this is helpful.

didn't clean IAC. but if there was a problem with IAC the chec engine light should glow?

35,725

I don't think I've ever run across an IAC code. It's easy to clean. https://www.youtube.com/watch?v=C419kwrH0vE ttps://www.youtube.com/watch?v=ez5ykPAMG8k

1 out of 1 people think this is helpful.
148,405

http://www.obd-codes.com/p0505 ..P0505 is IAC

1 out of 1 people think this is helpful.

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