I'm trying to get a good fuel map going. Car starts nicely and idles pretty well but bucks under moderate to hard acceleration. O2 sensor shows lean, but the sputtering makes me think it may actually be a rich condition causing misfire and lean reading, because it fattens up and smooths out if I hold throttle or just accelerate very slowly through the rev range. Map is pig rich for the most part, too.

So how do I turn off anything and everything that is mucking with the fuel until I get the map decent? I think the dTPS settings are adding too much fuel. There may be other things as well; I just don't know how they all interact, or more importantly - how to turn them off for now.

Feel free to tell me if my thinking is off on this in any way. I sorely miss VE Analyze at this stage!

 

AFRs can read lean when there is a missfire. This can happen even if pig rich.

Why not manually remove a certain percent of fuel in some cells and see if it can at least not missfire. Then you can work on dialing it in.

 

Yep, I know. That's what I think is happening. I tried removing a bunch of fuel but still get the bucking. I just imagine it's going to be easier to dial in when I don't have modifiers kicking in. The AEM has soo many things that interact!