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DFI and ECMDiscuss all aspects of DFI (Digital Fuel Injection), ECMs (Electronic Control Module), scanners, and diagnostic equipment. Fine tune your Third Gen computer system for top performance.
I purchased a custom APYP bin and XDF file from Blowerworks a few years back to enable their "Thin film" replacement MAF sensor to work with the APYP bin. Apparently Greg Carroll is retired so I cannot get in touch with them on this issue. I just got the engine completed and turned on with the attached Bin & XDF file. It runs poorly with AFR 9.5-10, extremely rich. I decided to upgrade to 60lb injectors so knew I needed to update the "Single Fire FI Size" scalar to 60 lbs and the "Display Injector Flow rate" to recognize the 60Lb injectors. The "Display Injector Flow rate" scalar is in Gallons/Hr so I attempted to input 9.9 Gal/Hr (equivalent to 60Lb Injectors) but the range for inputs on that scalar maxes out at 8.1 or 49Lb injector size. This would explain why the fuel/air is so rich, the ECU is calculating off a 49lb injector when 60Lb injectors are physically ion the engine. I'm looking for someone with the capability to identify the "Display Injector Flow rate" scalar in the Hex code and increase the max input to 12 gallons/hour so I can update the scalar with 9.9. I assume the ECU will use this value in its calculations on fuel air ratio and lean out the mixture given it recognizes the 60lb injectors.
I had to compress the XDF file attached. If you can't load it, send me a PM with your private email and I will email the normal size XDF. .
Thanks
Last edited by Clements408; Jan 6, 2024 at 03:35 PM.
Reason: Removing files.
The description is used for mpg display. Does the adx show mpg ?
it’s located at 0x620 and current value is FF. Probably have to rescale with formula in xdf and adx really not sure if it’s even worth the hassle to see mpg.I think it’s just used for an output display.
Last edited by Tuned Performance; Jan 5, 2024 at 08:38 AM.
Thanks for the feedback. With the help of someone on the Corvette forum, I was able to realize the memec was not plugged in all the way. The Ostrich 28 pin was not allowing the white hold down to fully seat. It wasn't much, maybe a mm, but after filing the white hold down on its side to fully click in, the SES code check shows 12 and the AFR's leaned out to 14-15. The computer is now referencing the bin updates. Finally got this engine turned on.
