Hey guys I just got the 408 fired up and I can finally drive this thing home, but it is running really lean at idle. The LT is at 25 on bank 1 and 17 on bank 2. THe short is bouncing around 0 so Im not too concerned with that. My LM1 is showing 15.1. So I just wanted to ask if someone can point me in the right direction to add a little fuel for my idle just to get it home and get gomer to finish the tune. Thanks guys

 

idle fueling is going to be mainly ve

 

Do you have the exhaust closed up, if open headers, that will cause it.

 

So should I just go in to the VE go to the KPA area being (65) for me at 1000rpm and scale that and the surrounding cells up about 5 or 6?

 

If you want you can send me your file and logs!
vortec350@gmail.com

 

If your fuel trims are positive, then you will raise the VE values.

 

I would add 6-7 to your lower Idle regions and check it from there, if it still needs more then add smaller amounts gradually till you hit what you are looking for. Are you saying that it is idling at 1000 rpm? and 65KPA?

 

Yes Im saying that its idling at 1000rpm and 65 kpa. I will try to add 6-7 to lower idle regions ( what would this be) I scaled the entire VE table by 18 and it helped some but now its running rough

 

You shouldn't scale the WHOLE VE table by that much unless it really needs it. The VE table is somewhat sensitive to changes. 18 is a LOT to scale any section by, especially the whole thing.

If anything, I would have just done the idle cells by that much, and the surrounding cells by 12, and the next going down by 6. The lower RPM areas are naturally going to have a lower VE number than the higher ones, same for the lower kpa.

Look on the HPTuners website at the screenshots, the VE table in 3d format is what you want to model yours after somewhat. Mine had a dip in the idle cells at 600 rpm. Its like it started going up from 0kpa then dropped down not quit as much by the time it got to the idle cells and then went up further than before by the time it got to 100kpa. I would post it for you, but I'm not on my laptop and won't be for another couple of days.

 

So Im thinking I should bring it back down and leave things alone until I can get some help with it. Well I drove it home tow night ago now. It has been sitting at my other house in NJ for almost eight months. You want to talk about scary knowing that its lean and making a hour long drive on a new motor, oh well. It was showing 15.1 at idle and it stayed between 14.7 to 16.5 on the drive home. However when I go tinto it just a little coming onto the freeway I would say about 5K rpm it must have gone into to PE cause it dipped way down to 10.8 The entire tune is very rough right now until Gomer can get in touch with me. BTW I just scaled the entire VE up by 17 to get it as rich as it was.

My only real concern with the motor right now is the noise it is producing, I hope its all valve train and maybe just needs some lifter preload or a small amount of slop. Im so used to hearing a blower whine that now I can hear all the small stuff!!!