It would be interesting to see what a wideband reports when it's misfiring.With the Saab I went from 31-ish combined to 27-ish combined. I have gone back and forth a couple times and the results are pretty consistent. Under boost it bucks and protests a bit where as with pure gasoline its a clean solid boost, same oct. No modifications made to burn tainted fuel. (BCB stage 2 ecu, 3"DP/race cat, CAI, 5sp)
I wanted to do that same swap with a pinto just to get away from smog checks. '75 and earlier vehicles are exempt in CA. There's no rolling 25- or 30-year exemption anymore though.The oxygenation requirement blows. I have only the deepest respect for the 2.3 Turbo fords. Had a 74 Pinto with a lightly modified 2.3 Turbo from a Super Coupe. Sleeper... yea! It was back when all gas was pretty good and would easily rival most V8s after 30 mph. The worst issue I had was keeping the carbs synchronized.
I'd suspect knock if it noses over, but actually misfiring could mean something else like spark blowout or too little/too much fuel.I have never programmed fuel injection so I'm not sure whats going on with the Saab, I assume the knock sensor is detecting something not right and dropping the timing. The Pinto I had was just super angry all the time and never missed a beat aside from 2 transmissions and a rear end.
It depends on the generation and hardware capabilities. A lot of modern cars, especially European and Japanese makes starting being equipped with wideband O2 sensors in the '90s. The VW 1.8T is one of them and a simple chip tune can increase the power by 50% on stock parts.I assume modern EFI can compensate for bad fuel with 02, knock sensors et al.
If the fuel and spark maps can be altered, then yes, the ECU can be adjusted to make the engine happy on E10. It's done all the time for people running E85 in non-flex fuel vehicles.So to not veer tragically off topic, I have no idea how to compensate for this different fuel. If there is more power potential there I wonder if folks who write tunes can write a Ethanol friendly tune.
A carbureted engine just requires larger jets and perhaps some tweaking to the ignition advance, but it's anyone's guess if soft parts in the fuel system will tolerate alcohol.More specifically, what can be done to the Suzy to help with this.
EFI Suzukis apparently can be chipped with either a simple socket mod and EPROM or a daughter board with programmable memory. Rhinoman has a site with more info about that.I'm not terribly concerned with MPG, its pretty darn good for rolling on 35s but if I could squeeze even 5 more HP I would be tickled, or even broaden the torque curve a little, anything at all. If I'm not mistaken you cannot re-flash the Suzy ECU, is this correct? If you can would writing a current tune with this tainted fuel in mind help in the slightest way?
How to compensate?
The level of difficulty is commensurate with the level of quality IMO.It sounds like a decent amount of effort for minimal gain. It would be great to see someone write a tune for one rather than customizing. I'm lagging behind in the ability to alter a tune in an ECU, this is something I will have to learn.
It really sounds like the only cost effective way to deal with this is to keep it as is and just burn the pure gasoline when I can find it. For the Saab I will probably head to Sturgis for fill ups where I can buy pure gasoline.