Z not running, no codes, help?!

ViCiouS

EDIT: Solution at end of thread. Post 11


2016 has not been a good year for my Z...

In January I found out my intake plenum was cracked AND my fuel pump went out...at the same time. Both got replaced, along with a new battery.

Z drove great again, up until Saturday. Saturday it felt like traction control would go on whenever giving moderate gas and hitting 3500 rpm. Shut off traction, put in slapshift mode, and it stopped happening.

Come Monday I started driving to work, it was doing it with traction off and in slapshift, something is definitely wrong. Went back home, and took the Ducati to work. I searched the forums far and wide to find an extensive thread by ak370z or something similar about camshaft sensor issues causing a 3k-3.5k limp mode. But the car was always still drive-able.

So yesterday i take it out to record the issue, assuming it will still be semi-drive-able. I go about a half mile in the first attached video. Any point you see it hang at an rpm then start dropping, is basically giving it hard gas but nothing happening. Towards the end of the video I have to pull off the road twice, let the car rest a sec, and then it starts going again. Right after the video ended (pulling back on my street) the car sputters and dies. The 2nd video (shorter) is current situation. Non-drive able.

There is no CEL. Fuel pump was just replaced 3 months ago. I do have a hole in the flex of the stock y pipe, but i really doubt thats enough back pressure drop to cause major issues that come out of the blue. I already tried resetting the ecu as well. I've basically parted out, current mods are only Stillen headers and crank pulley which have been on over a year with no issues.

1 - My first thoughts are to clean the MAFs and TBs first, make sure the tb's are opening as well. Recommendations for a good cleaner?
2 - Anyone know of a good way to fix the flex pipe w/o cutting and welding a new one?
3 - Could my fuel pump be crapped out again?! what would cause this.

Help?!

Drive around, can't really tell before 1:20, but starting there bogs down while giving hard gas, have to pull over, then revs fine, bogs again in 3rd, try giving more gas and nothing happens, slow down and shift to first, almost stalls, then randomly accelerates again: https://vid.me/9LGo
Car barely starts and dies, oil temp, voltage, gas, etc all good: https://vid.me/7kFb

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2014 Cayman S - Daily and Track - PDK | PSE | SC | PCM | H&R | HRE
2009 Ducati 848 - Weekend and Track - HMF | Ohlins | Microtec | Woodcraft | ASV
2010 370z Sport - SOLD - KWv3 | SPC | Stance Wheels | Z1 | Stillen | FI | Takeda | Uprev