Hello. I am trying to get the SD tune completed on my Saturn Sky. I have 80lb injectors with a fuel return system with 1:1 AFPR. I am running into an issue when I am going from VAC to Boost ONLY while tuning for SD. When the MAF is enabled and is the primary sensor for fueling it does not do this issue. If you look at the attached log, one example is at 6:42:15 time stamp. I will be trying to spool the turbo up and accelerate but it feels like the engine just quits and you hear a fast fuel cut noise until you let off and try it again. During that time my wideband shows its running really rich (about .70 lambda). I have been constantly taking fuel out of those effected cells on the VVE table but when logging its constantly saying to remove 25% or so which doesn't seem right to me. Is there some parameter causing this issue?
Thanks!4.hplsd tune e-85 new zone 16.hpt