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Rough idle

Tiny
SHARON1946
  • MEMBER
  • 2007 SCION TC
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 109,000 MILES
A friend put in a new battery today after my battery died. It starts fine but when I approach a stop light or put on the brake it idles very roughly like it is going to shut off. Then when I accelerate, it is fine. So he told me to let it run for five minutes or so and it seemed to be fine. After work it starts right up but after about five minutes it starts the rough idle again when I slow for traffic even after I drove it more than eleven miles home, with each slow down and braking the idle seems like it is going to shut off. How can an older woman like myself reset this without being ripped off by a shop? Help! Thank you!
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Monday, November 23rd, 2015 AT 9:31 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,870 POSTS
It sounds like your engine needs a tune up with the throttle bore serviced. Here are two guides to show you how to do the job:

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

and

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

Please run down these guides and report back.

Cheers
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Monday, November 23rd, 2015 AT 10:51 PM
Tiny
MAGGIECAIT
  • MEMBER
  • 1 POST
I had this problem and followed the guides worked perfect. Just use OEM parts!
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Friday, July 20th, 2018 AT 6:45 PM

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