Subject	Finally resolved a hesitation under heavy load issue.
Posted by	Evan_Wright (Ca) on March 14, 2013 at 9:22 AM
	This message has been viewed 875 times.
Message	Turns out it was my spark plugs. They were the pfr6b-11b's with only 2 maybe 3 thousand miles on them. They did have quite a few 21psi+ runs at the drag strip on them in 100 degree weather though. Perhaps that played a role. Anyways, I decided to switch to BKR7EIX and now the Z feels just like it did the day I had it tuned at SpecialtyZ. I don't know for sure yet but I think they were also the cause of my poor gas mileage. I've been averaging 11-12 mpg and that's with staying out of boost due to the hesitation. At idle my afr was always bouncing around the 10:1-12:1 range. With the new spark plugs it quickly finds that sweet spot at 14.7:1 again. Hoping for better gas mileage now! BTW, plugs were only $3.84 on amazon right now but almost gone... [ http://www.amazon.com/gp/aw/d/B000GZAUX6 ]
Follow Ups	Finally resolved a hesitation under heavy load issue. - Evan_Wright (Ca) 09:22:15 03/14/13 The EIX series ngk is suppose to be one of the most - TTZ2NV(EPTmotorsports) 09:42:12 03/14/13 Picked em up. Thanks! (n/m) - Antihero 11:04:27 03/14/13 hmmm - LJZTT 11:11:05 03/14/13 I had plans to check all kinds of things...most of which - Evan_Wright (Ca) 11:49:23 03/14/13 those plugs don't look long enough - moxie (SF) 11:21:14 03/14/13 check this out: - Antihero 11:30:28 03/14/13 Ok great thanks! i have 10k on my plugs and have trying to - Hydrus 14:27:05 03/14/13 I wonder what Greg found out after aliaZ sent him his plug. (n/m) - DVDBURN (MD) 17:29:10 03/14/13 That's because Antihero picked up a set^^^ (n/m) - Evan_Wright (Ca) 11:42:09 03/14/13 You had a defective plug then... The PFR6B-11B's are good - Ash's Z 11:53:56 03/14/13 I agree that the pfr6b-11bs are fine for my setup. They - Evan_Wright (Ca) 11:58:44 03/14/13 Now I just need to figure out why I have such a strong smell - Evan_Wright (Ca) 11:54:11 03/14/13 Curious. Why do you want to switch your throttle bodies? - michaell32 (FL) 12:04:14 03/14/13 They have a few characteristics to them that I don't care - Evan_Wright (Ca) 12:15:28 03/14/13 I understand. Those reasons are why I chose the stanzas. - michaell32 (FL) 12:43:02 03/14/13 Here are a few links that helped me doing the conversion. - michaell32 (FL) 15:09:15 03/14/13 Thanks. I'm planning on slotting the bolt holes like the guy - Evan_Wright (Ca) 15:18:05 03/14/13 Thats how I did it after reading a post by Ash a while back. - michaell32 (FL) 15:57:07 03/14/13 This happens on mine sometimes, and on my old 280zxt too - MegamanMk2 13:38:16 03/14/13 I wonder if it is because the coolant overflow tank has - MixManMash 14:54:25 03/14/13 I too have hesitation but only on start up & and also poor - Hydrus 13:53:26 03/14/13 They are shorter. See the link Antihero posted above for - Evan_Wright (Ca) 14:10:15 03/14/13 switched to EIX's a couple years ago... - vorpalZ 14:08:38 03/14/13 To Ash's point, did the new plugs affect your idle adversely - Haasz32 14:38:09 03/14/13 Not that I have seen on any Z's in our area running them. (n/m) - MixManMash 14:56:37 03/14/13 I should add, if they have been tuned. Sometimes Z32s - MixManMash 14:57:43 03/14/13 no change in idle or fuel economy that was noticeable - vorpalZ 15:25:15 03/14/13 I feel your pain on the truck mpg's. My '05 F150 5.4L only - Haasz32 08:02:52 03/15/13 The problem is, the Frontier isn't much better than a full - MixManMash 22:35:32 03/15/13 Thanks for this post! I have been fighting this same issue! (n/m) - Josh91CRPTT 14:08:57 03/14/13 Just purchased mine from amazon! I think there are 7 left. - Josh91CRPTT 18:44:26 03/14/13 I think this is a good resource. - Tanley 15:49:18 03/14/13 I wouldnt use that as a "resource" - ZXoltan 16:58:39 03/14/13 Granted the descriptions are generalized. - Tanley 21:28:09 03/14/13 Nice. (n/m) - DVDBURN (MD) 17:27:04 03/14/13
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