i cannot get the afr below 10:1 at idle no matter what i do. i have lt1 edit and have changed everything. i told it i have 24 all the way to 45lb injectors, set it to open loop only and changed all the fuel settings. it is supercharged. i would like to see some other files to make sure my initial settings were close. computer was done at powerdyne. i am using the logging data from lt1 edit

 

Ummm...10:1 is rich as ****, and you do not want that. Are you trying to run the car in closed loop? From what I hear, I do think there is a way to have an open loop idle and run the car in closed loop. I'm not sure on how to do it though. Then, you'd make changes to your MAF calibration tables (if you're running a MAF) or your VE tables (if you're running speed density).

 

I Made A Mistake In My Wording. My Car Is At 10:1 Afr And I Am Trying To Get It To 14.7 To At Idle. With Lt1 Edit I Can Set My Car To Stay In Open Loop To Try To Get The Base Calibration Close So My Block Learn And Integrators Don't Get Maxed Out. The File For My Mass Airflow Calibration Came From Powerdyne And I Don't Know How Close It Is. They Use 30lb Injectors And Computer Reprogramming For The Fuel Enrichment. I Can't Get My Number To Go Where I Want Tuning All Spots Except The Maf Calibration. Powerdyne Siad To Never Adjust That Under Any Circumstance. I Wanted To Look At Some Other Datalogs Or Base Calibrations On Cars That Actually Run Good. I Am Ready To Program The Computer Stock And Put An Fmu On It And Start All Over From Scratch. Thanks To All. This Site Rocks

 

If your BLM's are not even close, then they didn't do their job of calibrating the MAF tables. You do know that the wideband stops at 10:1, don't you? You could actually be richer than that. I wouldn't drive the car at all with it like that. You'll wash the cylinder walls down. I can type more later, but I have to take advantage of the hour and a half of daylight I have when I get home from work.

 

Thanks For The Info. I Have A New Innovate Box With An Aux Box. The Wide Band Does Stop Right At 9-9.5:1. I Can Easily Make It Richer And Really Pour The Smoke To It. Plugs Are Getting Expensive And I Hate Changing Them Every Other Day While I Try To Tune. Thats Why I Would Like To See What Others Are Showing. Hertz To Grams Per Second Conversions,what They Are At Idle And 2000 Rpm. Supercharged Cars Only. I Am Going Nuts Here. About To Convert To Fast Or Holley Commander But Don't Know Enough About Them And Tech Keeps Telling Me To Look At The Instructions For Help. Tired Of Paying For The Exxon Exects Condos In My Fuel Cost.

 

Suggestion.... take the "caps lock" off. When you type in all caps, the board software changes everything but the first letter of each word to lower case letters. Makes it very hard to read and understand.

 

Are you trying to run a closed loop tune? Open loop is much easier to tune, IMO. If you're having that much trouble with the MAF, switch to speed density and tune with the VE tables. You should be a lot closer than what you are. Hell, start with the stock tune and get the car running like that. That tune you have may be a lost cause.

 

going to try some maf aclibrations to see if i can get it closer and will keep posting. never noticed the caps lock, thanks. it is hard to read

 

tried to alter maf calibrations. made over 300% changes and finally got the car to respond. powerdyne said not to change the maf under no circumstances. i guess i should have listened to my gut. i am getting a lot closer. i would like to know what most supercharged cars are showing in grams per second at idle to compare

 

Holy cow. Congrats though. Just keep with it and you'll get it. I wish I could help with a supercharged program or log. 97WS6SCharged is the only person that comes to mind that could give you specs on that stuff (and does tuning and logging). PM him and see what he says.

 

I've been doing some closed loop tuning (97 OBD-2/ 383 - FI 15psi), and had idle problems. First, I corrected a problem with the bypass valve. It was dumping air @ low speed, and, engine would run @ afr 10:1 (MAF is on blower intake side). That fixed alot. Then I've been adjusting the MAF cal (95% reduction) to move AFR higher (running to rich @ 2000+ rpm and closed loop no wot). It worked, but then the computer changed all the BLM values and the car satbilazed closed loop in the 12 to 12.8:1 afr area. Now I see in LT1 edit version 2.2 there is a setting for BLM update in fuel menu. I believe that may block updates, and, allow me to tune by adjustment of the MAF cal alone.
Seams you can't help to mess with everything when you modify these PCM's. They were not designed for this.