So ive been chasing my tail with issues in my car for a long time now and finally decided to post in here hoping for some help or useful input.
The vehicle : 2001 Chevy cavalier LD9 2.4 engine and 5 speed manual trans. pcm has the gm supercharger reflash as a base (2 bar speed density tune)
the issues : for starters when I try to data log I need DFCO and the car to be in open loop. Commanding it into open loop is no problem, commanding DFCO to stay off is an issue. no matter what I do the car still will enter dfco when I coast in gear after letting off the throttle. Ive set the 3 tables I have for that to the max so it doesn't enter dfco but it still does it no matter what. A few years ago the car would do it but now it doesn't. It does what it wants to.
Another issue im having is adjusting air fuel ratios. Ive been playing with my idle table and whenever I attempt to adjust the idle fueling to reach close to 14.7 the car just leans out no matter what I do. I add fuel and it goes all over the place. im logging with histograms and an AEM uego wideband. Sometimes the car will idle normally and sometimes it idles rich and then sometimes it idles lean. Its driving me insane. im currently using 80lb siemens deka injectors. the car runs decently but I recently changed to a smaller turbine housing and I need to re adjust the tune. the car has a 62mm turbo on it.
I need this thing to command what I tell it to when I tell it to and it just isn't working. 4-29-18 retune.hpt