Subject	Re: Ok great. Now how does this idle feedback interact
Posted by	zromtech on June 27, 2015 at 10:31 AM
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In Reply To	Ok great. Now how does this idle feedback interact posted by ConVerTT on June 27, 2015 at 09:03 AM
Message	The ECU determines idle mode by checking the TPS sensor voltage, if it falls below a certain threshold the throttle plate is considered closed and idle mode is set. If the TPS sensor is faulty, it falls back to using the the idle switch. With both plugs disconnected, the ECU will never see idle mode and will switch to using the O2 feedback for non-idle and > 10km/h, which adds more fuel and doesn't lean out as much when it cycles. So yes, O2 feedback is still enabled with them unplugged, but its not the idle O2 feedback mode.
Follow Ups	What else to check... - Stanky 00:18:22 06/24/15 Don't feel offended, but let me ask you this.... - puchy 07:29:06 06/24/15 Compressed air to driver side, hockey puck blocking - Stanky 09:20:35 06/24/15 Check you idle stops. FSM section for TB setup. (n/m) - BoneZ (MD) 07:33:41 06/24/15 Will check tonight, thanks (n/m) - Stanky 09:22:17 06/24/15 EM-21 in the 95 FSM - BoneZ (MD) 19:19:40 06/24/15 Honestly i notice no change by disconnecting it - Stanky 19:34:00 06/24/15 Hell, that may be an issue. - BoneZ (MD) 19:49:52 06/24/15 if you changed smic piping you could mix up recirc and EBC - Dane (Houston) 09:53:50 06/24/15 I've been running the selin kit for a couple years now - Stanky 14:39:58 06/24/15 Re: I've been running the selin kit for a couple years now - Dane (Houston) 21:59:48 06/25/15 Have you tried it with just the TPS switch? (TPS sensor - ConVerTT 12:50:38 06/24/15 My NA is having this same issue. tried 2 TPS with clean pins - XTZ 18:09:08 06/24/15 So .... - ConVerTT 20:36:52 06/24/15 Can you run ECUtalk to check some parameters? (n/m) - OverZealous (CT) 17:45:25 06/24/15 Consult readings - Stanky 18:53:12 06/24/15 One more - Stanky 18:54:09 06/24/15 Re: One more - Dallas DamonZ 19:16:03 06/24/15 So... - ConVerTT 20:26:02 06/24/15 Correct! - Stanky 20:46:32 06/24/15 Awesome! - ConVerTT 23:20:02 06/24/15 Didn't realize it was open loop at idle - BlackholeZ 11:15:33 06/25/15 Actually, the ECU *does* have o2 feedback at idle - zromtech 13:39:07 06/25/15 Hmmm. That is interesting intel... - ConVerTT 16:44:11 06/25/15 Re: Hmmm. That is interesting intel... - zromtech 12:25:10 06/26/15 Should be able to disconnect the O2 and run at idle? (n/m) - BoneZ (MD) 12:29:51 06/26/15 yes, that should tell you if the O2s are involved (n/m) - zromtech 13:13:43 06/26/15 Ok great. Now how does this idle feedback interact - ConVerTT 09:03:08 06/27/15 Re: Ok great. Now how does this idle feedback interact - zromtech 10:31:23 06/27/15 Ok great. I was hoping that was the answer... - ConVerTT 11:43:47 06/27/15 Fuel pressure good, all injectors firing and ohm 12.5 - Stanky 14:22:44 06/27/15 Re: Actually, the ECU *does* have o2 feedback at idle - Dallas DamonZ 00:35:48 06/26/15 Mine would idle at mid 14 afr for about ten seconds - xpwarrior 10:43:27 06/26/15 Re: Mine would idle at mid 14 afr for about ten seconds - zromtech 13:01:56 06/26/15 FWIW, Nistune allows you to enable O2 feedback - aliaZ 17:24:47 06/26/15 You can also do that with Tunerpro or even hex editing - xpwarrior 18:22:31 06/26/15 or ZROM Pro!* - zromtech 11:39:28 06/27/15 Appreciate the static pics but was hoping for transients vid - OverZealous (CT) 18:13:29 06/26/15 Please let us know exactly what the problem turns out to be. (n/m) - Zuberman 01:28:00 06/25/15 I've had similar issues, it ended up being a bad MAF - Zvil (FL) 09:36:15 06/25/15 Good point ... - ConVerTT 10:52:55 06/25/15 I have suspected my MAF to be questionable for years. Maybe - Zuberman 12:24:25 06/25/15
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