Meanwhile I’m over here wondering if my car will explode from being too lean, is running too rich, or the variance between LAMBSE and STFT has things targeting what’s deemed to be okay lol. The joys of boosted cars.As does the air fuel ratio....
Yeah. Unless you're one of these guys like Cory, or Engineermike, that totally gets it, you have to really trust your tuner and data log every once in a while and let them review it to make sure everything is playing well with everything else.
I'm certainly no tuner nor do i have a clue what I'm looking at, but does the FRP-actual-psi mean Fuel Rail Pressure??? If so, you hit like 3200 psi at one point. Is that part of the direct injection system??
So I downloaded @LOL WUT log and compared it to my own log on the dyno. As everyone keeps saying I am no tuner/ calibrator even thou a real one did chime in and say yes it’s lean and I would have to agree. He did a pull to what looks like 7100 rpm’s and his lambese does read .8 at the end of the pull but during the pull he is mostly above the .9 mark. Now if you compare it to my own log at the beginning of the pull I start at .78 and end at .8 at 8k rpm’s never going over .8 and sometimes even below the .78 where I started. I can post a video if someone wants to see first hand what I am talking about.
How do you get a chart like this? I am messing with the VCM scanner and did two logs… can’t figure out how to see a view like above… if that’s what I’m even supposed to be using.For reference I’m seeing quite a bit higher lambse at WOT. No idea if thats ideal but sharing for reference purposes. Looks like at WOT I’m at .88-.95 at WOT. Below is a snap shot of one of my logs showing 100% throttle and the lambse highlighted. Later in the pull lambse holds steady around .88
I think ruiner may be right though. The more I research it, it seems like lambse is what the ecu is demanding. Not what is actually occurring. The afr1&2 are the actual numbers. Lambse and fuel trims are what the computer is doing to try and correct it. Where the heck are all the smart guys to set us straight?!
You are correct about the wording and I was taking my numbers for lol wut’s from the wrong column and he does stay below .8 until he lets off the throttle. My numbers are from the afr/ WB EQ ratio 1 and 2 for my logs that I spoke about.I think ruiner may be right though. The more I research it, it seems like lambse is what the ecu is demanding. Not what is actually occurring. The afr1&2 are the actual numbers. Lambse and fuel trims are what the computer is doing to try and correct it. Where the heck are all the smart guys to set us straight?!
He is using an N-guage to log and load tunes. I actually like VCM scanner better because you can slow it down and watch what ever parameter your looking for.
Always glad to help you know that. I will say during my pull the most that my “Lambese” commands is .832 for a millisecond and then goes back down in what it is commanding. I’m glad you checked with Lund and hopefully have some peace of mind!!
So on the VCM scanner, what exactly should I be looking at A/F ratio wise.. the LT Fuel trim/ST Fuel trims chart?...
I believe that is right for throttle command. Since you are tuned by Wengerd you should be logging the same channels as I am. Look for WB EQ ratio bank 1 & 2.
cool.. looks like mine is .73-.78 @ WOT.I believe that is right for throttle command. Since you are tuned by Wengerd you should be logging the same channels as I am. Look for WB EQ ratio bank 1 & 2.