New 408 and need some serious help
Ok here is my 408 parts list (previous motor was stock):
6.0 GM Iron Block
GM L92 Heads with Stage 1.5 porting
GM L76 intake with 39.82lb injectors @ 58psi
242/250 .648/.614 Cam on 113LSA
90MM TB
LT Headers
LM1 Wideband
6speed
Ok, here is the issue I am having. During startup and at idle the car runs really really rich 12.80-13.2 AFR or so, fluxes alot. I have setup the inj scale according to the sheet on the sticky section of LS1Tech. I have decreased the VE tables to about 21 where the car idles and still no change in the AFR. When the car goes into closed loop the STFT go to about -35 to -40 and my AFR shows about right 14.7 to 15.3. As soon as i step on the gas AFR goes WAAAY lean, upper 20's and sometimes 30's, the car shudders and stalls a little then levels out. I have my LTFT disabled and I am trying to tune in SD mode (maf unplugged). When I had my stock motor it did run rich but not this rich.
Things already tried:
1. Decreasing the VE table
- got the values all the way down to about 21 and still not change
2. Increasing Inj. flow rate
-increased the values from 39.82 to about 54.
-this helped with the rich idle, got it to about 14.6 to 15.4
-however, when i try to take off the car leans way out and dies, cant drive 10ft
3. Decreasing the O2 sensors (bank 1 & 2) by 2%
- no change in AFR
- not sure how it has helped since I turned off closed loop
4. Turning off PE
- figured what the hell
5. Increased idle to 1000 RPM
- not much of a difference, still rich
6. Increasing the inj offset similar to another 408 tuned motor.
- no change still rich.
I am attaching my latest scan and my current tune along with my WB config file.
Well I'm running out of ideas, any help would be GREAT!!!
