Weird stalling during boost

nic370 · 07-11-2019, 12:01 AM

Quote:

Originally Posted by Jinxx

It does cut throttle pretty hard ... I have half a tank of fuel and haven’t had any issues before with less fuel .... but I’m not sure what fuel starvation acts like... and also this is happening on a straight away.... I also thought fuel starvation made the car cut off

Yep mine would do it with that level of fuel on a hard enough pull
I and it was like a violent head but the wheel cut out for a split second and then the pump would pick up again

I have a second pump feeding the stock bucket now like z1s idea

Again not saying this is the issue but a simple one to rule out/test

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Jinxx · 07-11-2019, 06:20 AM

Quote:

Originally Posted by nic370

Yep mine would do it with that level of fuel on a hard enough pull
I and it was like a violent head but the wheel cut out for a split second and then the pump would pick up again

I have a second pump feeding the stock bucket now like z1s idea

Again not saying this is the issue but a simple one to rule out/test

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I ran some test runs last night and this morning ... haven’t had the issue pulling 11 lbs smoothly ... I’m keeping my eye on it .. and I’ll go through it more this weekend

TBatt · 07-12-2019, 01:39 PM

Test with a full tank and see if that clears it up. If the top hat on the fuel pump has broken (mine did) it will cause fuel feed issues.

JARblue · 07-12-2019, 01:50 PM

For reference, my stock fuel pump top hat broke and I experienced full fuel starve with more than 3/4 full tank. Car shut down and wouldn't start up. Had other times since where the car sputtered hard on the throttle out of a turn before recovering. Now I have the CJM billet top hat and Road Race Pump Kit

Jinxx · 07-12-2019, 03:17 PM

Quote:

Originally Posted by JARblue

For reference, my stock fuel pump top hat broke and I experienced full fuel starve with more than 3/4 full tank. Car shut down and wouldn't start up. Had other times since where the car sputtered hard on the throttle out of a turn before recovering. Now I have the CJM billet top hat and Road Race Pump Kit

When mine cut out it never cut off ....it would just decrease rpms even with pedal still to the floor ...if I lift the pedal up it would idle normal ....and start working normally ......haven’t had the issue since reflashing

nic370 · 07-12-2019, 05:09 PM

Quote:

Originally Posted by Jinxx

When mine cut out it never cut off ....it would just decrease rpms even with pedal still to the floor ...if I lift the pedal up it would idle normal ....and start working normally ......haven’t had the issue since reflashing

Mine was the same until my tuner mapped the car to shut **** down fast if it saw lean afr on wot

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07-12-2019, 01:39 PM	#18 (permalink)
TBatt Premium Member Join Date: Apr 2013 Location: Huntsville, AL Posts: 832 Drives: 2019 GT-R Rep Power: 20168	Test with a full tank and see if that clears it up. If the top hat on the fuel pump has broken (mine did) it will cause fuel feed issues. wideglideleon likes this. __________________ RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!

07-12-2019, 01:50 PM	#19 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,449 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	For reference, my stock fuel pump top hat broke and I experienced full fuel starve with more than 3/4 full tank. Car shut down and wouldn't start up. Had other times since where the car sputtered hard on the throttle out of a turn before recovering. Now I have the CJM billet top hat and Road Race Pump Kit __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

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