Fuel pressure?

Neo187H · 11-25-2011, 01:53 PM

To bump a now old thread, I now have larger 725cc injectors as well as a 300lph pump installed in the car and I'm still running into this same lean issue above 7000RPM.

Any thoughts or ideas?

I know the tuner is currently reading over this specific thread so I'm hoping maybe someone knows something thats way above my head that will give them some insight.

Vince@R/T · 11-26-2011, 03:35 PM

Sounds like the MAF values or the K fuel Multiplier is way off. You need to have a happy medium of the two. If one is way out and you try and compensate with the other it will throw BFS way out. Also a F/I 370z is a tricky car to learn UPREV on. Probaly the hardest actually. PM me if interested in maybe some E Tuning or coming down here...

toner123 · 11-27-2011, 09:28 AM

you can check the k or even have the tuner load a different uprev map but I think you are having the same issue that I did. My fuel pump assy(housing where you put your fuel pump in and holds the regulator) was bad. We suspected it had a crack or a clog in it, so we replaced it, and no more issues.

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11-25-2011, 01:53 PM	#1 (permalink)
Neo187H Enthusiast Member Join Date: Jan 2009 Location: Albany, NY Posts: 302 Drives: PW 370Z Rep Power: 17	To bump a now old thread, I now have larger 725cc injectors as well as a 300lph pump installed in the car and I'm still running into this same lean issue above 7000RPM. Any thoughts or ideas? I know the tuner is currently reading over this specific thread so I'm hoping maybe someone knows something thats way above my head that will give them some insight.

11-26-2011, 03:35 PM	#2 (permalink)
Vince@R/T Base Member Join Date: Mar 2011 Location: Lansdale PA Posts: 87 Drives: 99 GS400 Rep Power: 15	Sounds like the MAF values or the K fuel Multiplier is way off. You need to have a happy medium of the two. If one is way out and you try and compensate with the other it will throw BFS way out. Also a F/I 370z is a tricky car to learn UPREV on. Probaly the hardest actually. PM me if interested in maybe some E Tuning or coming down here...

11-27-2011, 09:28 AM	#3 (permalink)
toner123 Track Member Join Date: May 2010 Location: chesapeake va Age: 40 Posts: 823 Drives: TT 370z Touring/SP Rep Power: 16	you can check the k or even have the tuner load a different uprev map but I think you are having the same issue that I did. My fuel pump assy(housing where you put your fuel pump in and holds the regulator) was bad. We suspected it had a crack or a clog in it, so we replaced it, and no more issues.