94 Miata low idling wants to die


Old 05-25-05, 11:41 AM
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Red face 94 Miata low idling wants to die

The rpms at idle should be around 900 but dies unless the clutch is engaged and then it only is about 100 or 200 rpm's.
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Old 05-27-05, 09:57 AM
Join Date: Oct 2000
Location: Livonia, Michigan
Posts: 923
Try cleaning the throttle body bore. With use, the bore gets a buildup of carbon around the butterfly valve which messes up the idle. To clean, remove the throttle body and clean the bore and butterfly valve using carb cleaner (or throttle body cleaning spray) and a toothbrush. You'll have to work at it...the stuff is hard to get off. When clean, you should see an even gap of air around the butterfly valve. Disconnect the battery for a minute afterwards, to force the computer to relearn the new idle parameters with the clean throttle body.

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