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

JONSOLOW13

MEMBER
2007 CHEVROLET AVEO
1.6L
4 CYL
2WD
MANUAL
107,000 MILES

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

1 Reply

ASEMASTER6371

MECHANIC
52,797 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).

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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

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