SG Fuel cut off value

[civic lover]

I just got my SGII in today and am setting it up. I will be putting it in my HX. What is the value for the fuel cut off screen?

[Lelandjt]

I'd like to jump in and ask the same question but for a 2004 Subaru WRX STi. I left this setting as it was.

[Jay2TheRescue]

The fuel cutoff setting isn't in most of the manuals, only the absolute most recent edition. According to the manual you take your idle TPS reading, and add 4 to it, and that's your cutoff value. The default of 25 works for most vehicles without any further changes though.

[palemelanesian]

^ That's a good place to start. Then, do the following and adjust as needed.

Watch the Loop gauge and the MPG gauge. You want to see 9999 mpg any time it's showing Open Loop, under DFCO (engine braking).

Be aware that the HX has lean-burn, and the Scangauge can't properly read this. It assumes a standard air/fuel ratio all the time.

[civic lover]

Thanks for the reply. I figured it out after playing with the SG last night for about an hour. The only thing I hate about the SG so far is that the horse power reading is wrong. You can't tell me when I am idling that the engine is only producing .9 horse power. Unless I have it improperly installed or misunderstand this gauge, I think it is useless.

[theholycow]

I can believe .9 HP for idling. How many horsepower do you think it takes to turn a 4 cylinder engine at 800rpm?

Any guesses at how to do the math? Or, maybe we could compare to starter motors?

[VetteOwner]

yea did you think you were using all 140+ hp all the time? lol i hope not!

at idle there's virtually no load on the engine hence why in a manual tranny car if you dont press the gas some when trying to take of from a dead start its gonna stall(generally speaking).

[civic lover]

Originally Posted by VetteOwner

yea did you think you were using all 140+ hp all the time? lol i hope not!

at idle there's virtually no load on the engine hence why in a manual tranny car if you dont press the gas some when trying to take of from a dead start its gonna stall(generally speaking).

Of course I didn't think this. But when I am driving it says it is only like 2 hp. This just isn't correct.

[theholycow]

Originally Posted by civic lover

Of course I didn't think this. But when I am driving it says it is only like 2 hp. This just isn't correct.

Ok, if it's reading 2hp while steady-cruising, that's definitely got to be incorrect. At what speed did you see that reading?

[civic lover]

Originally Posted by theholycow

Ok, if it's reading 2hp while steady-cruising, that's definitely got to be incorrect. At what speed did you see that reading?

When I was watching it I was going 60 mph for 2 hp. I know I know...this isn't right, but that is what it is reading. I don't really care that it doesn't work. I just wanted to let people know that the xgauge isn't great, but if someone can correct me I would love to hear from them.