Doubt about my A/F Ratio

Vince@R/T · 09-13-2011, 09:31 AM

^^^ Sound like you just need some more work on Cranking enrichment. Also there are things you can do with the Electronic throttle tables to open the throttle blade slightly during cranking to help with starting. As far as your fuel trims being at "#114" it means the ECU is adding 14% fuel at idle and needs to be trimmed in a lil better. I'm sure Sam can send you some updated tuned ROMs to help your issues.

tjaartk · 09-16-2011, 03:43 AM

Thanks Vince, where woulkd one access the throttle blade settings at cranking? Is this available in the ROM editor?

EVOHUNTER · 09-17-2011, 01:55 PM

TJAARTK , im having the exact same problem!! makes me not want to drive the car to grocery store/ convience store because i dont want to look like a idiot when it doesnt start. If i give her some gas she will fire up but its annoying! Im also having a problem with my idle, idles at about 950-1000rpm but will dip down to maybe 600rpm. Almost boging out, but feels more like a misfire.
im going to bring it back to my uprev tuner, he said he can fix this.. weve messed around with the starting issue and still havent found an fix for it.
I thought maybe i didnt drill out my fuel regulator enough or to much?

Vince@R/T · 09-21-2011, 02:03 PM

Quote:

Originally Posted by tjaartk

Thanks Vince, where woulkd one access the throttle blade settings at cranking? Is this available in the ROM editor?

They are in the ETC Table you can datalog it while cranking and see where the cells are and raise the values in that area that will crack the throttle for you while you are cranking to help with hot start. Also UPREV just came out with some cranking enrichment table that came be modified as well.

tjaartk · 09-22-2011, 06:33 AM

Thanks Vince,

Sam has sent me a ROM file with adjusted cranking enrichment tables - and this has made a big improvement. It appears that the standard cranking enrichment settings was too high (rich) for our altitude (6000ft).

09-17-2011, 01:55 PM	#18 (permalink)
EVOHUNTER Track Member Join Date: Jul 2011 Location: Edmonton, Canada Posts: 681 Drives: BOOSTED3-7-0 Rep Power: 15	TJAARTK , im having the exact same problem!! makes me not want to drive the car to grocery store/ convience store because i dont want to look like a idiot when it doesnt start. If i give her some gas she will fire up but its annoying! Im also having a problem with my idle, idles at about 950-1000rpm but will dip down to maybe 600rpm. Almost boging out, but feels more like a misfire. im going to bring it back to my uprev tuner, he said he can fix this.. weve messed around with the starting issue and still havent found an fix for it. I thought maybe i didnt drill out my fuel regulator enough or to much? Last edited by EVOHUNTER; 09-17-2011 at 02:31 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
VHR + FD Gear Ratio upgrades - 3.9 and 4.08	KLRCADI	Engine & Drivetrain	170	02-19-2016 11:16 AM
low vs high compression ratio for FI	Legz	Forced Induction	17	07-30-2012 12:50 PM
doubt anyone has these for sale(red interior pieces)	jrniehaus	Parts for sale (Private Classifieds)	2	05-27-2010 12:05 AM
Unpopular Post (no doubt but...)	Slynky	Nissan 370Z General Discussions	66	11-27-2009 12:07 AM
Close ratio gears?	tvfreakazoid	Engine & Drivetrain	24	01-30-2009 04:44 PM

09-13-2011, 09:31 AM	#16 (permalink)
Vince@R/T Base Member Join Date: Mar 2011 Location: Lansdale PA Posts: 87 Drives: 99 GS400 Rep Power: 14	^^^ Sound like you just need some more work on Cranking enrichment. Also there are things you can do with the Electronic throttle tables to open the throttle blade slightly during cranking to help with starting. As far as your fuel trims being at "#114" it means the ECU is adding 14% fuel at idle and needs to be trimmed in a lil better. I'm sure Sam can send you some updated tuned ROMs to help your issues.

09-16-2011, 03:43 AM	#17 (permalink)
tjaartk Base Member Join Date: Jan 2011 Location: South Africa Posts: 29 Drives: 370Z Rep Power: 15	Thanks Vince, where woulkd one access the throttle blade settings at cranking? Is this available in the ROM editor?

09-22-2011, 06:33 AM	#20 (permalink)
tjaartk Base Member Join Date: Jan 2011 Location: South Africa Posts: 29 Drives: 370Z Rep Power: 15	Thanks Vince, Sam has sent me a ROM file with adjusted cranking enrichment tables - and this has made a big improvement. It appears that the standard cranking enrichment settings was too high (rich) for our altitude (6000ft).