Engine RPM's slow to return to idle when driving/shifting

2007 CHEVROLET AVEO
107,000 MILES • 1.6L • 4 CYL • 2WD • MANUAL
Avatar
JONSOLOW13
  • MEMBER
  • 133 POSTS
We just bought this car, and the engine RPM's are slow to decelerated back to idle when driving/shifting. Can you give us an idea of what the problem might be? For background, the gasket between the CAT and the exhaust manifold is leaking so the check engine light is on, and you can feel the air puffing out from it.

Thanks,

Jon
Jan 5, 2021 at 7:48 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Good morning,

Can you give me any codes that are set?

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

I would clean the throttle body as the plate may be sticking and not returning as quickly as it should.

https://www.2carpros.com/articles/throttle-actuator-service

https://www.2carpros.com/articles/how-a-throttle-body-works

Roy

Throttle Body Inspection and Cleaning

Caution: Wear safety glasses when using compressed air in order to prevent eye injury.

1. Remove the throttle body from the vehicle. Refer to Throttle Body Assembly Replacement (See: Throttle Body > Removal and Replacement > Throttle Body Assembly Replacement).


imageOpen In New TabZoom/Print

2. Open the throttle valve of the throttle body.
3. Use a solvent soaked cloth to remove dirt or carbon deposits/buildup from the throttle valve and the throttle bore.
4. Ensure that the throttle valve and throttle bore are clean and dry.
5. Inspect that the throttle valve operates smoothly and freely.
Install the throttle body to the vehicle. Refer to Throttle Body Assembly Replacement
Image (Click to enlarge)
Attached Media
Jan 5, 2021 at 8:35 AM