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Pontiac Fiero
Timing Belts and Chains
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How do you adjust the cylinder timing on a fiero?


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Wiki User
July 30, 2008 3:35AM

you cannot adjust the iddle on a 84 fiero. the iddle control is made by the computer. there is a air control selenoid on the left of the throttle body. the selenoid controle the iddle air flow. to make sure the selenoid is working properly, you can remove the air boll and filter so you can see the point if the selenoid. when the engine is passing from high revolution to iddle, the selenoid will move. if it moves it is probably in good working condition. if the iddle of the engine is too high, you might have a vacumm leek somewhere. check all the vacumm hoses for proper working condition.