Engine high idle

2007 HOLDEN VIVA
150,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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CHARLIE PAGE
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Car was running sweet! Zero problems. Recently when i started it, it revs to 4,500 RPM's and stays there. No vacuum leaks, no hoses off, no wires off, injectors are fine. This has me stumped? I'm an old school mechanic and i have never come across anything like this in my 55 years on the tools. Please help! Awaiting a response.. Thank you. Cheers, Charlie.
Aug 26, 2020 at 9:13 PM
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4DRTOM
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Hi Charlie,

How about did you check for the vacuum leaks?
Seeing sometimes they can be hard to identify visually. I use carburetor cleaner and spray around the vacuum lines and intake while its running. the idle will change when you spray close to a leak.
Let me know,
Tom
Aug 26, 2020 at 10:29 PM
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STRAILER
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Hello, this is common when the throttle bore needs to be serviced. here are two guides to help you:

https://www.2carpros.com/articles/engine-idles-too-high

and

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

Please run down these guides and report back.
Aug 27, 2020 at 12:44 PM
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CHARLIE PAGE
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Hi Tom, mate! This was the first thing i did. Definitely no vacuum leaks! Thanks, Charlie.

Hi Ken! Sorry for the delay... I thought i had responded to you. Mate, i have done everything you suggested and still no solution? I'm stumped! Cheers, Charlie
Sep 11, 2020 at 1:33 PM
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STRAILER
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Lets service the throttle bore that should fix it. please use the guide posted above.
Sep 14, 2020 at 1:21 PM