Much to my surprise a 2003 1500HD customer who I haven't seen in a few years who I tried to tell him never use Chinese injectors with NO data. I fudged and seemed to get it right and it worked pretty well. So he had an injector fail (who would have thought) so I told him about the 50lb GM injectors that work GREAT for his application and perfect data.
He buys a $600 set of 17U-21-0050-8 DW's. I get the data and it does not match up at all. GM_injector_data_17u-50_1.0.xlsxIDLE.hplTUNE 1 INJECTORS TO 59LBS.hpt
I call DW. He says they are wrong for the vehicle but will work..... Huh? So he tells me run them at 57lbs across as it is a return style regulated motor. It has a moderate to large cam but here is the thing. It will only idle. Any sudden movement seems to go into DFCO. I should have just let this one go until some good data injectors are installed but I want to just get it running. I have to feather the pedal to get rpm. I'm not getting any data from the scanner for LTFT or STFT's. VERY little data other than a bunch of zero's. Maybe just have the wrong layout. Anybody wanna check this for me? I tried going up a couple pounds at a time on flow. with only a slight improvement.