RPMs increase when the engine is idling

1988 NISSAN MICRA
200,000 MILES
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CHRISTNEO
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Rpm increase at idle.
Mar 20, 2022 at 9:48 AM
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JACOBANDNICKOLAS
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Hi,

This vehicle isn't offered in the US, but I will try my best to help.

When there are variations in idle speed, the first thing to check for is engine vacuum leaks. Have you done that? If not, start there. Here is a link that shows how to do it:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

If none are found, I need to know if this has a separate fuel injector for each cylinder, one throttle body injector, or if it has a carburetor.

Let me know.

Joe
Mar 20, 2022 at 8:49 PM
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CHRISTNEO
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Thanks Joe. I have been away for a while due to some engagement, but I really appreciate your reply. This is no doubt one of the best repair sites I've ever come across. I am now back fully into repair operations and will definitely have a lot to ask from this forum. Thanks
May 5, 2022 at 12:57 PM
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JACOBANDNICKOLAS
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Hi,

You are very welcome. Let me know what you find or if you have other questions. Also, please feel free to stop anytime. You're always welcome.

I will watch for your reply.

Take care,

Joe
May 5, 2022 at 8:17 PM
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CHRISTNEO
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Thanks.
May 11, 2022 at 1:06 AM