Hey guys. Im gonna post up a data log for you guys to take a look at. My stft and afrs are very strange to me. My idle is about 10.7 afr, and then when i boost and come out of boost they look very rich. Maybe i need a more defined tuned for the lower end of the map? I have a stage 2 ots map from cobb. I have a injen intake, and a hks ssqv blow off valve vta. If i had a vacuum leak it would be lean? It's pulling fuel for some odd reason I just reset the battery so that whys my ltft are only -6.5%. Normally they are -12% and the care barely wants to idle as u can tell by my afrs. Can anyone chime in?

 

is your maf facing the right direction and hooked back up? which map did you use

 

bump

 

really bumping it after 3 hours ? shameless post to get you post count up ?... mental note; do not buy a thing this guy is going to sell.

 

hey so heres the thing, i checked cobbs notes on the map and te afrs they said i should be at, im nowhere close to hitting. My car is running so rich compared to those numbers. My LTFT at idle is -12.5% it doesnt go any higher, which is strange because it can max out to -25%. My afr's at idle literally go from 10.7-11.1 then back down to like 10.6 which is absolutely absurd. Yesterday since i live in buffalo, it was 18 degrees out i started my car, rpms fluctuated then it stalled out 3 seconds later. I was able to immediately start it back over, but still. If i had a boost like I'd run lean at idle, then rich under boost. My afrs even under boost never go past 11.7 whats wrong help!!

 

Isn't it 25% spread? -12.5% to +12.5%?

Rich

 

ecu's have a 50% spread. -25% and +25% so im confused with my problem

 

what map are you using ..... and i was under the impression as well that +- 12 was max, the fact that idle afr is in the 10's and fuel trims are not going below -12 pretty much proves that. not to mention rich knows more about these ecus then you know about the back of your hand .... so how about you tell us the one big thing we need to know ... what map are you using... if its a map for a 3" maf then you will run pig rich

 

I am using the cobb ots stage 2 map for my injen intake and turbo back exhaust. If rich is so smart about evos, or you for that matter. then maybe one of you two would be able to enlighten me as to why my car (even with a tune) is running so damn rich?

 

It's your bov.

Swap it back to stock. The HKS are know for nothing but problems on our cars.

I'm local to you

 

swap what exactly back to stock? and DM me ur number please

 

Do you currently have the stock blow off valve?

I've recent read a thread where some had the same problems and he swapped out the HKS blow off valve. I guess they're know for nothing but trouble.

I don't think an ots tune is supposed to run an aftermarket bov especially one that is atmospherical.

I live in Amherst. Shoot me a PM if you need any help.

 

Look at my first ****ing post lol I'm trying to help you but you didn't give me any info ... Try flashing a stock intake map if its still pig rich then check bpv (back to stock) if it leans out a lil over stock then you know the intake is installed correctly fuel trims should be within +-8

 

Tune shouldn't be affected by bov/bpv that is properly adjusted .. Unless the map table is complelty f-ed.

 

Cobb told me they should be +\- 5 but that might be conservative.