I've got another one that I've wasted way too much time and fuel on. After having to "tweak" the idle on this thing - requiring a VE redial, I decided to convert it over to a 2 bar OS to keep from having to put up with the virtual ve and to have a more detailed fuel control. I know there was a post with an almost identical problem a few weeks back in regards to what I've got going on, but I can not find it. I'm sure it's something stupid that I didn't click on when I did the OS conversion, but not sure since SO much changed in how this things behaving. Plus I've never had this problem before doing the OS conversion this way.
What I've got going on is when getting into boost, my fueling begins to lean out to the point where I abort. Every time it wants 30% more fuel and I've just about maxed out my VE table in this area. The VE table is completely different now from what it was. Before it was almost spot on to what was being commanded with boost. It's already almost double what it was. This is only with 8psi of boost too. I would say that something is wrong with the car, but this started immediately after the 2 bar os install. Never the less I will be checking fuel pressure Monday just to rule it out. I've also had problems with open loop fueling being way off since doing the conversion, but fixed that with a slight increase in my OL injector temp and intake valve temp multipliers. Since they are both OL issues, thinking it might just be the same problem...
I've attached the tune, datalog config and the lean spike issue while making a pull. This was right after flashing, so it had the pain in my arse "rich after flash" issue for those looking at the fuel trims at the beginning and scratching your heads. You can see the trims at the end settle down to where they're supposed to be. Thought about that causing an issue, but it never has before and even with the -3 fuel being pulled, it's not enough to throw the fueling out 30+%...
Sorry for the long winded post. Here's the datalog...
Thanks for any and all help.
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Originally Posted by realcanuk
Well although injection timing being moved in the correct direction did help tremendously, it was not my problem. Apparently when pricing out fuel pumps - I was told I'm just making too much power for my stock fuel pump. Anything over 600hp to the rear wheels on a c6 needs lots a fuel. That was what they told me anyway after I checked my fuel pressure and she was dropping to below 30psi with throttle. Also noticed today "when the problem wasn't present", that my idle fuelng would go from +/-2% to "problem being present" and a +24 ltft and running at a 18AirFuel 
Explains why I've been having so many problems dialing this bastard in. Plus today it had really really long cranks after the pump started to let go.
