Subject	vacuum leak?
Posted by	TriniTT on April 26, 2012 at 10:28 AM
	This message has been viewed 235 times.
In Reply To	Stumble at low rpm, kinda stumped. posted by Woody75 (Denver) on April 24, 2012 at 10:43 PM
Message	I know you know what you're doing, but could there be a minor vacuum leak that went unnoticed? You could spray some starting fluid around to see if it affects the engine. Also, have you checked/cleaned the tbs? If they can't close properly they can cause this problem from letting air past. Cheers, JBrobst "A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing." George Bernard Shaw
Follow Ups	Stumble at low rpm, kinda stumped. - Woody75 (Denver) 22:43:52 04/24/12 Still have EGR? - Joe@ZSpeedperformance 23:25:02 04/24/12 Tried it, no change. (n/m) - Woody75 (Denver) 22:26:42 04/25/12 Have you tried a different ECU? - toykoz32 01:19:49 04/25/12 Yep, it in my list I posted. (n/m) - Woody75 (Denver) 09:06:48 04/25/12 almost sounds like an open loop vs closed loop issue - aliaZ 06:04:21 04/25/12 Answers. - Woody75 (Denver) 09:11:08 04/25/12 Same.... - 300ZMang 09:03:34 04/25/12 suspect dying injector or bad coil or injector connection - Dane (Houston) 09:59:33 04/25/12 Coils have been proved out. - Woody75 (Denver) 10:32:01 04/25/12 I have seen injectors cause this, even Nismo's that ohmed - marklar182 10:08:56 04/25/12 As have I. - Woody75 (Denver) 10:32:53 04/25/12 if you have an injector that is underflowing - aliaZ 11:23:26 04/25/12 I'm leaning towards this post, and the AR post below. - CoHPhasor 21:43:46 04/25/12 FPC has been swapped out already (orginal post) - Woody75 (Denver) 22:22:51 04/25/12 Right, but how's the voltage? - CoHPhasor 01:53:29 04/26/12 Had this issue for the last 2 months and fixed it 2 days - HK'S Z 12:02:32 04/25/12 Checked it, its good. - Woody75 (Denver) 22:24:45 04/25/12 Suspect VTC gear or oil pressure to VTC (n/m) - OverZealous (CT) 22:55:11 04/26/12 Re: Stumble at low rpm, kinda stumped. - AsaHerring 12:39:31 04/25/12 Was the cas/pin rusted when you pulled it out? - Joe@ZSpeedperformance 08:39:06 04/26/12 Aliaz already asked this. - Woody75 (Denver) 09:09:27 04/26/12 vacuum leak? - TriniTT 10:28:55 04/26/12 What about the TPS sensor? - DVDBURN (MD) 20:43:45 04/26/12 It reads fine. - Woody75 (Denver) 09:26:54 04/27/12 You didn't say anything about the TPS in your OP. (n/m) - DVDBURN (MD) 10:08:06 04/27/12 Oh damn, sorry. Just saw that. (n/m) - Woody75 (Denver) 10:15:38 04/27/12 Sounds like sensor or fuel delivery. - DVDBURN (MD) 10:54:55 04/27/12 Few updates - Woody75 (Denver) 22:32:41 04/27/12 I had a PTU go bad before where it caused - KongZTT GT28RS MD 22:52:58 04/27/12 "Swapped out PTU" (from original post) - Woody75 (Denver) 11:45:49 04/28/12 sorry.. didnt read it thoroughly :) - KongZTT GT28RS MD 12:54:59 04/28/12 Couple thoughts for you - 300ZMang 08:38:17 04/30/12
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