pkriner

I recently put a 418 ls3 in my c6 and had it tuned but the tuner could not figured out why it keeps dumpin fuel to the motor,its running very rich its been tuned by a 3 different places has good compression and all could it have a bad computer possibly??

tblu92

Need more info---
what type of tune do you have ?
stock open/closed loop
speed density
semi open loop
Do you have LT headers?
Is the richness at P/T ?
is the richness at WOT only or both
what is the AFR they are telling you it is when it's rich ?
Did your tuner diable the LTFT fuel trims ????
Are you running a MAF
Are you running the FRONT 02's

are you using the stock ECM
and finally what IFR rate are your injectors

mvvette97

I know this is really old but I'm having the same issue. mine is stock other than exhaust. No matter what I do to the tune it goes crazy rich on the trims. This all happened after a calibration flash. kinda wonder if mine is damaged from the flash or something

schpenxel

Guys, gen 4 ECM's take a good 20 minutes of driving to settle down after a flash. There are several threads on HP Tuners forum where we're trying to find out what is causing it. It seems to be most related to injector tip temp and intake valve temp. Both of these things are calculated and the calculations are reset during a flash, so it takes a good bit of driving around before they get back to their "normal" temps. In the mean time, it will be rich. So, give it some time before worrying about it (and before using any data you get)

http://www.hptuners.com/forum/showth...ch-after-Flash