Subject	Right. But you'll notice it in Mode II check>>
Posted by	Zarcasm(Hfd, CT) on March 25, 2009 at 10:02 PM
	This message has been viewed 311 times.
In Reply To	The CEL will not come on for a slow O2 sensor>> posted by ZUL8TR on March 25, 2009 at 04:35 PM
Message	I didn't check the actual voltages from the old O2 sensor. I watched the flashes and the RHS was no where near 5 CEL blinks per 10 seconds, in fact the CEL stayed on completely. All tests were performed at 2000 rpm. The new O2 sensor is OEM. I think OEM is Bosch, right? The new O2 flashes much less than 5/10 seconds whereas the RHS O2 sensor is completely normal. All RHS spark plugs are charcoal black. Now I'm suspecting maybe an air leak on one side of the engine leading to imbalanced airflow? The manual calls for pinching off PCV flow and/or disconnecting the canister. It's taken me a while to locate the PCV valves and looks like a real pain to pinch them off. Any other thoughts?
Follow Ups	Brand new O2 sensor slow response - Zarcasm(Hfd, CT) 23:14:08 03/23/09 Make sure you did not get right and left sides confused. - Fast300 00:32:37 03/24/09 I'm sure I got it right. - Zarcasm(Hfd, CT) 18:23:56 03/24/09 The CEL will not come on for a slow O2 sensor>> - ZUL8TR 16:35:53 03/25/09 Right. But you'll notice it in Mode II check>> - Zarcasm(Hfd, CT) 22:02:27 03/25/09 Hook up a vacuum gage after the throttle bodies >>> - ZUL8TR 09:25:17 03/26/09 Thanks! Does the O2 sensor screw into an additional nut>> - Zarcasm(Hfd, CT) 23:23:40 03/26/09 The extra nut on the O2 needs to be removed so the new one > - ZUL8TR 05:22:11 03/27/09 Intake manifold vacuum maybe steady... maybe not - Zarcasm(Hfd, CT) 19:38:10 03/29/09 That vacuum reading at idle is good. The vibs occured > - ZUL8TR 14:43:24 03/30/09 I'm not sure intake vacuum is ok. Valves?! - Zarcasm(Hfd, CT) 21:06:04 03/30/09 You say that the RHS O2 is normal and all RHS plugs>>> - ZUL8TR 14:47:08 03/30/09 My mistake: meant to say LHS O2 is completely normal - Zarcasm(Hfd, CT) 20:28:19 03/30/09
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