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a/f gauge problems

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Old 04-05-2009 | 02:59 PM
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Default a/f gauge problems

What could cause my a/f gauge to go from the actual a/f ratio to full lean then back to actual a/f ratio slowly getting leaner until it finally just stays full lean?
Old 04-05-2009 | 03:04 PM
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Wideband or no?
Old 04-05-2009 | 03:06 PM
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AEM wideband
Old 04-05-2009 | 07:08 PM
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heatsoaking could.
Old 04-05-2009 | 07:11 PM
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Exhaust leak pre-sensor will cause lean readings at idle.
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