Subject	I've has the EXACT same problem before...(link)
Posted by	escturbo on April 21, 2011 at 9:18 AM
	This message has been viewed 161 times.
In Reply To	Mysterious hesitation at 10psi of boost posted by eliteturbotuner on April 18, 2011 at 08:59 AM
Message	I ended up trouble shooting *everything* possible, and stupid me checked the fuel pressure as the last thing. I rigged it up with a generic auto parts store E.F.I. /hose and gauge kit/, connected it to the(post) fuel filter line, snaked it to my windshield and zip tied it to the driver's wiper(shut the hood onto the F.I. hose). While driving, under load, it would run perfectly normal until 4k rpm or ~10 psi of boost, but then the hesitating/bucking/etc. began as the fuel pressure immediately dropped to about 25 psi. It was very severe, but was able to run seemingly very well in the lower rpm/boost range. Tracked it down to the fuel pump and replaced it myself. It's easy to get to the fuel pump and you must swap the factory FP housing over to the new one. Just a note: the petrol smell will make you delirious...?! [ http://twinturbo.net/nissan/300zx/tech/fuelpump/fuelpump.html ]
Follow Ups	Mysterious hesitation at 10psi of boost - eliteturbotuner 08:59:16 04/18/11 Sounds like you have boost leak somewhere (n/m) - RobZ32 11:50:40 04/18/11 2nd the boost leak. Had this happen to me a long time ago. - Sleeper_TTZ(SeKy) 23:30:57 04/18/11 check for corrosion at your PTU and subharness - aliaZ 12:25:03 04/18/11 check the ohms for your injectors - Paulym1111 20:44:47 04/18/11 I've has the EXACT same problem before...(link) - escturbo 09:18:43 04/21/11 Re: I've has the EXACT same problem before...(link) - eliteturbotuner 08:38:00 04/22/11
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