Subject	My guess is the closed loop a/f adjustments do not base
Posted by	LitlElvis on April 21, 2010 at 11:08 PM
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In Reply To	Thanks LitlElvis posted by Zarcasm(Hfd, CT) on April 21, 2010 at 07:12 PM
Message	themselves upon the assumption that the VTC is on or off. The A/F ratio is a direct measurement and regardless of the camshafts being advanced or not, the ECU will do it's best to correct it. If your VTC are gummed up to the point of them not activating in a timely manner, I recommend flushing the oil system with a product aimed at removing built-up varnish.
Follow Ups	What controls the amount of VTC timing advance? - Zarcasm(Hfd, CT) 18:13:19 04/20/10 IIRC VTC solonoids are duty cycled - Spddracer 19:44:17 04/20/10 I believe its just off of oil pressure. - Machtavian 20:00:06 04/20/10 I think you'll find it engages above idle... - zx299 20:12:50 04/20/10 Thats what I said. (n/m) - Machtavian 20:51:31 04/20/10 Where did you come up with the 2,500 rpm number? - Zarcasm(Hfd, CT) 21:20:16 04/20/10 That's where Greg D. sets them to come on if my memory - Machtavian 21:29:43 04/20/10 nope, try again (n/m) - Seb@Specialty-Z 23:32:10 04/20/10 My understanding of the VTC system..... - zx299 19:54:48 04/20/10 They are either on or off depending on engine load. - Ash's Z 19:55:30 04/20/10 Interesting , I must be thinking too new ;) - Spddracer 20:14:36 04/20/10 This was supposed to be... - xpwarrior 20:52:16 04/20/10 Thanks Ash. Ever heard of a VTC acting lazy and sluggish? - Zarcasm(Hfd, CT) 21:12:02 04/20/10 I have a hard time visualizing the VTC mechanism being - Ash's Z 07:36:11 04/21/10 Does the a/f schedule directly depend on VTC advance? - Zarcasm(Hfd, CT) 19:02:23 04/21/10 It's a simple on/off mechanism with the control variables - LitlElvis 07:04:52 04/21/10 is this the reason for the caps on the back of them melting? - LJZTT 15:14:08 04/21/10 No relationship whatsoever - LitlElvis 16:22:24 04/21/10 Thanks LitlElvis - Zarcasm(Hfd, CT) 19:12:56 04/21/10 My guess is the closed loop a/f adjustments do not base - LitlElvis 23:08:42 04/21/10 I recently used ATF to clean out the oil - Zarcasm(Hfd, CT) 20:10:20 04/22/10
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