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If all that is correct, then this ELF is the most amazing thing I have ever heard of.Originally posted by esmith13
The only thing the ELF chip does is suppress CEL codes that should not be seen (like the presence of boost)and also acts as an O2 Simulator and MAF Simulator.
So in a CN setup (currently) you have:
Stock ECU - acts normally and swears the engine is completely stock.
ELF Chip - O2 Sim., MAF Sim and supress the Stock ECU's complaining about boost presence, rich fuel conditions, etc. ELF chip is a TEMPORARY flash module. When you first start the car it "flashes" the stock ECU to do it's bidding and then does absolutely nothing untill the car is turned off and then on again at which time it flashes the ECU again since it's flash isn't permenant. You could literally disconnect the ELF once your car is started and function normally.
S-AFC II - intercepts the stock ECU's fuel settings and modifies them on the fly to what is needed for the turbo/larger injectors to be happy and run at a good A/F ratio.
In the NEW setup they are working on you will have:
Stock ECU
Guardian EI
ELF Chip if not embeded in the Guardian Box
I can imagine EXACTLY how the Guardian works... If you've ever been involved in Dyno tuning your own car it very simple.
On the dyno, the car is driven under normal load. With the guardian you literally drive it.
With the dyno and the guardian, you start with overly rich settings to be safe, and back out excess fuel as you tune to perfection.
You continue to back out more fuel till you reach an optimum A/F ratio which is determined by a tailpipe sniffer on the dyno that is a wideband O2 sensor. This is the only part I haven't exactly figured out about the Guardian. Only thing I can think of is that the now defunct secondary O2 sensor on our car is good enough to determine the A/F ratio fairly accurately and the guardian uses that to tune with instead of how you use a wideband O2 sensor on a dyno. Maybe CN has a wideband sensor included with the new computer to swap out with the secondary O2 we have now???
It could work. Alls that means as while your driving with whatever it determines to be your current fuel map, it's always checking current performance at a specific RPM/Throttle position so it can update the fuel setting for the next time you hit that exact RPM/Throttle setting.
Think of it as this. Every time you get behind the wheel there is a computer dyno tuning your car. Everytime you touch the gas it's tuning. And the best part is it will be more accurate than a dyno. You get the fuel map set up based on the actual amount and tempature of air your car is breathing outside on the street versus what it gets in the shop on the dyno with fans set up to "emulate" the air forced across the IC and the air accessable by the intake filter.
I'm getting all warm and fuzzy just thinking about it....
Eric
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