Subject	Another Z with hesitation problems.
Posted by	wellcraft on January 09, 2014 at 7:46 PM
	This message has been viewed 536 times.
Message	I have 2 300zx's and both are 1990's with hesitation, but I'm starting to work on the one I just bought a few weeks ago with only 24k original mile. When I bought the Z it ran fine, I actually took it to Z1 Motorsports for a pre purchase inspection as the seller lives 20 minutes from them and everything was ok. Drove from carrolton ga to were I live, about 2 1/2 hours and the car ran perfect. Like 2 days later I started up the engine and let it warn a bit and when I started driving the car I felt the hesitation, turned if off for about 10 to 15 minutes and then it was fine it's been doing this for the past 2 weeks but sometimes if I start driving it goes away. The weird thing is that if I turn off the engine for 5 or 10 minutes and turn it on again is gone, this works most of the time but if I drive around and turn it off again and start it up again a few minutes later I have the hesitation again. I checked the codes and I have none. I will start working with a few links I have found but was wondering if someone know what could be the problem before starting to attempt the whole thing. By the way, the car has the original ptu, the guys from Z1 said they were impress how new the original ptu looks, it looks like it came right out of a new box, it is the aluminum face. After I fix this I'll jump to my other z. Thanks in advance for any help. BTW, for those of u who read this thread I'm posting the different links I have found so far. [ http://www.zhome.com/ZCMnL/PICS/hesitation/hesitation.html ] [ http://www.twinturbo.net/nissan/300zx/faq/faqpages/hesitate2.html ] [ http://www.zhome.com/ZCMnL/PICS/ecu/ecu.html ] [ http://z32.wikispaces.com/ECU+Diagnostics ] [ http://www.zhome.com/ZCMnL/PICS/coolantTemperatureSensor/coolantTemperatureSensor.html ] [ http://www.pexcom.com.au/z32cms/e107_plugins/content/content.php?content.340 ] [ http://www.pexcom.com.au/z32cms/e107_plugins/content/content.php?content.393 ] [ http://www.pexcom.com.au/z32cms/e107_plugins/content/content.php?content.335 ] [ http://www.pexcom.com.au/z32cms/e107_plugins/content/content.php?content.487 ]
Follow Ups	Another Z with hesitation problems. - wellcraft 19:46:46 01/09/14 Re: Another Z with hesitation problems. - wellcraft 20:02:11 01/09/14 Re: Re: Another Z with hesitation problems. - wellcraft 20:22:33 01/09/14 What about vacuum leaks then? - Zinister1 20:47:58 01/09/14 Re: What about vacuum leaks then? - wellcraft 21:05:46 01/09/14 You can purchase them from Z1 or from the maker - Hydrus (Dallas) 21:26:35 01/09/14 Re: You can purchase them from Z1 or from the maker - wellcraft 21:56:12 01/09/14 You can search the forums as many people have built - SammybTT(TN) 21:31:17 01/09/14 Re: You can search the forums as many people have built - wellcraft 09:00:45 01/10/14 Re: Another Z with hesitation problems. - pfitzgerald 10:49:33 01/10/14 I had similar symptoms with a failing fuel injector. - Agent X 11:59:35 01/10/14 I would do wiring checks. - Woody75 (Denver) 13:07:15 01/10/14 Next time you feel the hesitation, perform a power - 300ZMang 13:16:56 01/10/14 Re: Next time you feel the hesitation, perform a power - wellcraft 15:05:13 01/10/14 AIVs (n/m) - Woody75 (Denver) 15:07:14 01/10/14 Re: AIVs - wellcraft 18:34:49 01/10/14 it has an issue - 300ZMang 13:34:13 01/11/14 Re: it has an issue - wellcraft 17:45:07 01/13/14 I've never disconnected a FI while car was running - 300ZMang 08:23:11 01/14/14 Re: - wellcraft 09:26:13 01/14/14 Re: - wellcraft 19:04:18 01/14/14 Yea that's normal, but not TOO much. - 300ZMang 09:38:30 01/15/14
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