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Re: Actually, bently says no light on while driving with O2 Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Wed, 19 Mar 2008 09:13:19 In Reply to: Actually, bently says no light on while driving with O2, nicknick [Profile/Gallery] , Wed, 19 Mar 2008 08:48:49 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Plugs say rich and ECU saying lean makes lots of sense. It could be either the ECU or the O2 sensor that's lying. But if the ECU thinks the engine is running lean, it's going to richen the mixture. But the (bad) signal still says lean, so it'll richen the mixture more, up to the adjustment limit (abou 20% for the O2 sensor circuit).
That's why you always pull the plugs. They don't lie.
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