crf538

iTrader: (3)

while was tuning my friends car the other night i ran into this crazy lean spike right around tip in to boost, around 90-110 kpa the wideband jumps way lean no matter what i do with the ve table. commanded afr is where is should be and ive taken that area of the ve map 20% over the cells around it with no change...like going down the load colum reads something like 70 71 80 90 95 90 80 74..then back to normal ( sorry ill try and post the tune later) I would say its not going into PE or boost enrich but command AFR is around where i want it. at first i thought it was the sensor flaking out but the narrowbands switch too in that range. anyone have any ideas ?

the car
9.3:1 ls1
88mm turbo
80lb injectors
alkycontrol
2 bar sd

I tried to post my config as well but it wouldnt let me, is there a way around this?

jrocstar

iTrader: (31)

post your cfg. Are you logging the wb? are you tuning with maf enabled? there will be a point where the maf transitions to sd and its possible if your map values are way off your getting that issue

jrocstar

iTrader: (31)

Ok i see no maf information so I am assuming you are tuning sd only. when you got your cruise tune dialed in did you reenable pe enrichment vs tps and also make sure your pe enable is at a lower kpa?

crf538

iTrader: (3)

yeah im logging an lm1, i dont remember exact values because im at work but i brought the PE tps down to like 45% over 4000 rpm..the BE table still comes in at 110 kpa but if you look at command afr its seems to be pretty close to where it should be, it just goes like 4 points over commanded right before it builds boost in first gear..ill try to post that config when i get home