Subject	Re: Stumble at low rpm, kinda stumped.
Posted by	AsaHerring on April 25, 2012 at 12:39 PM
	This message has been viewed 319 times.
In Reply To	Stumble at low rpm, kinda stumped. posted by Woody75 (Denver) on April 24, 2012 at 10:43 PM
Message	My first Z did this one time. Not sure if it's the same kind of stumble. But I had a dual intake with jim wolf filters, and the filters had these black plastic covers on them. When I took them off one day, I couldn't drive the car at low rpms because it would stumble a little bit then it would leap forward. It felt similar to if you let the rpms drop to around 300 or 400 without pressing the clutch in. As soon as I put the filter covers back on it was perfect.
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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