ok 383 LE2 heads 236/242 111lsa. LTs 58mm tb le ported intake, no emmsions, all new sensors o2 extensions done right. harness extended,36 lb injectors supporting fuel mods, so on so forth, no vacume leaks no exhaust leaks, ok so when its in open loop the car is awsome runs fin great hits closed loop it has terrible response time starts running really rich wont idle, all i have for exhaust is a y pipe im told this could effect it, when its idling the computer is trying to compensate for 15% to much fuel im sure theres things im forgeting start chimin in

 

I dont think that will effect it at all, Im betting on the harness extension for the o2s. Did you extend them yourself or do you have 02 extensions?

 

i extended them my self. they are done professionally since i have a budy that solders for a living correct gauge wire and all they are reading perfect on data log

 

i shouldnt say perfectly but correctly

 

you don't have too much overlap there to really **** with the o2s...

define o2's reading correctly...

 

Well shall I try an post a data log

 

Who tuned it? What spark plugs and gap? As long as you have at least 12" pipe past the O2's they should read okay.

 

someone here locally tuned it.

 

so you just fired up the 383 for the first time and this started to happen or did it just start doing this out of the blue? was the car tuned for 36lb injectors? are both banks showing up as really rich? what is your timing at idle? Do you have a wideband whats it read in open loop vs. closed?

 

i believe its 22.0 at idle. car is tuned for 36lbs. right bank is reading richer than left. i do have a wide band jumping from 15.1 to 14.7 at idle at 1%tps it is almost perfect.

 

AND yes this is a fresh build

 

im assuming the open loop you are talking about is the period while your car is warming up. at this point the car will idle at a higher rpm then in closed loop. what are your rpms in open loop and closed loop?

how big of a split do you have between the right and left side?

 

i beleive the split is 7/14 at 0 tps at 1%tps they are 0. and it idles at the same open and closed loop and yes that is what im speaking of. im just gonna buy lt1 edit and OL SD tune it myself..

 

i would recommend tunercats over lt1edit. its cheaper and has more tables. when you do get the software maybe some more closed loop 0% tps timing could help you out. i run 32degrees at idle in my 385. might help but if the timing is the same in OL as CL then maybe not.

 

wow thats alot of timing but i could see how more timing might help. i really need tuning software.... any help

 

if i get tunercats do ineed a data logging program aswell or does it come with one?

 

nvm just figured it out

 

If you don't mine me asking who tuned it? I'm running around the same size of cam in my 383 and my tuner did a BASE tune on it and it drives just fine. Once the weather clears up, he is going to actually tune the thing.

 

It's the same guy that did yours I believe. Anthony. We worked on it for 7 hours two Sundays ago. Just being a pain.

 

And it's really far for me to trailer to topeka. Done it twice