Low idle RPM?

2009 SCION TC
150,000 MILES • 4 CYL • 2WD • AUTOMATIC
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BHAMDOC1973
  • MEMBER
  • 2,007 POSTS
I noticed that when coming to a atop the isle is low around 600 and a minor shake due to that. No codes. But there is also something else. When you come start it in the am it turns over several times before it starts, then once warm and within a short period of time it will immediately start. But if you leave it a bit and try again takes long time ago. Anything that rings a bell that can use that? Not sure if its related.
Aug 22, 2025 at 9:00 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,837 POSTS
  • ASE Certified Mechanic
The idle RPM of 600 sounds correct. I sounds like you have a vacuum leak or low fuel pressure. Here is a guide and a video to go over to help us fix the problem:

https://www.youtube.com/watch?v=LRKWV4Are5c

and

https://www.2carpros.com/articles/low-engine-idle

Please go over these guides and get back to us.
Aug 22, 2025 at 9:21 AM
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