VXSS
January 2nd, 2012, 07:07 PM
I'm working on tuning my VX SS Commodore, currently it's set up in SD mode and is ignoring the O2 sensors for the time being (at least until I solve this issue), the car is pretty standard except for the SS Inductions Growler, the MAF has been removed, and twin 3" and 4-1 extractors... The transient fuelling issue really became apparent after installing the extractors and exhaust, I believe it to be caused by more air being sucked into the cylinders changing the way fuel is added.
at first look it appeared to me that the injectors are firing too late causing a lean out under light load, and trailing rich spike afterwards, the injector timing tables seem to do two parts of f'all to change this, has anyone got any experience fixing this issue with the transient fuelling tables?
I've attached a log file, a good example is frame 5117 thru 5147... I don't believe this to be a VE issue as other parts of the log referencing the same VE cells do not appear to be lean...
12490
at first look it appeared to me that the injectors are firing too late causing a lean out under light load, and trailing rich spike afterwards, the injector timing tables seem to do two parts of f'all to change this, has anyone got any experience fixing this issue with the transient fuelling tables?
I've attached a log file, a good example is frame 5117 thru 5147... I don't believe this to be a VE issue as other parts of the log referencing the same VE cells do not appear to be lean...
12490