http://www.hptuners.com/forum/showthread.php?t=36097

the log file and tune is in the link.




Hey guys, I had another thread on here about the car not getting spark and fuel well that been taking care. the car is a 240sx with a :

LS1 shortblock
317 heads
120 lbs injectors
aem injector driver
E85 gas
76mm turbo
3 bar map
No MAF
Stock cam
acdelco iridium spark plugs



The car idles fine, afr at idle is 11.3 afr. when i drive its fine the second I try to smash the throttle and chokes and the wideband goes leannn. In my log file you will see when TPS goes past 50ish% rpms dont even climb up. If anyone knows anything im missing here or need to adjust anything, its well appreciated.

Heres my log file and tune, any inputs well appreciated. Thanks

 

You say fuel and spark are "taken care of" but I suspect that is partially true
at best or there wouldn't be this problem.

With huge boost are you sure this isn't the spark "blowing out" (failing to jump
gap at high cylinder pressure) and the "lean" just all that raw air blowing
through to the exhaust?

 

But it doesnt even make it to positive pressure (boost). If I drive and only give like 40% throttle it will make it thru all rpms the second I try to give it load or more then half throttle it just chokes and wideband goes flat lean. I will make a video today along with log.

Hp tuners emailed back saying to have a more realistic VE table, I will change that as soon as I get home.