What up people,

I don't know why my fuel value is so high. If you look at the values in that part of the map they don't correlate to the fuel value. I checked the ect correction trim which is not set very high at that temperature. Am I looking at this wrong or am I missing something.

Let me know what you guys think.

I've include a picture that has the fuel value in red and what section of the fuel map the car is using at this point.

I have also included a video that shows some datalogging that I recorded. In this video I go through the ect correction table to check the trim. Let me know what you guys think.

-Avery



[youtube]Z5TjgC6ys9k[/youtube]
I Give up on trying to embed this video!!!!!!!!

Here the link

 

Fuel map, corrections, and battery injector compensation. I'm not sure what the concern is as long as it's repeatable and you're getting the results you target.

 

I know people usually get really worried when they are at higher RPM and they see a 'lean' spot. But it's actually the engine working in a more efficient area of the map and requires less fuel. I think that is sort of what you have here. If your values are still good (EGT, AFR, ect) I wouldn't worry too much about what the map looks like.

 

What I am trying to figure out is what numbers are being multiplied or added to give you the current fuel value. I thought that the current fuel value would be a two way interpolation between cells plus the trim value from ect corrections. But after looking at the numbers they dont seem to add up.

Also as a tuner I want to know exactly how much me changing fuel table cell values affect the final fuel value. I dont want to sit back and just hit "+" or "-" on a keyboard to see how it affects an analog wideband sensor. That would be just accepting things at face value.

 

Well I just gave you the answer, so it should make sense now. If you're still not sure ask more questions.

That's also why Final Fuel Value is there... so you can see how much changing fuel table cells affect the final fuel value. Sounds like exactly what you need.

 

Does the final fuel value correlate to anything, say, pulsewidth? Or is it a semi-arbitrary number?

 

Since you alter fuel maps in raw values the fuel value is represented the same way for just the purpose he's trying to use it for. I'm considering adding ms representation in parenthesis next to it.

 

Okay that's what I figured. The ms notation would be much appreciated