2009 Toyota Corolla RPM?
When idling at a red light or something, my RPM idles at 800.
Which is fine, but every 10 seconds or so, my RPM drops to 600 and you can feel the engine is about to stall or something, it has that shaking/studdering feeling to it. Like if you're driving a manual, and you let go of the clutch slowly, you can feel that shaking/studdering feeling before it stalls.
It doesn't make any noise, it just has a physical vibrating studder when it drops to 600 RPM. Then after a few seconds it goes back up to 800 RPM and stops studdering.
Is this car suppose to do that? Is there something wrong with it? I bought it used a few months ago with only 40,000 km on it.
I purchase the same gas that I purchase on previous cars and it's from Imperial Oil (Esso) so it's good quality gas.
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