I?ve been having a problem with my STFT that goes beyond MAF and no one seems to be able to figure it out. I can?t fix it, nor can some pretty experienced tuners I?ve spoke with and sent files to. So it?s time I reach out to even more experienced tuners.
I have a 2012 Mustang GT with cobra jet, twin 67mm, JLT cold air intake and 1 7/8 longtubes. I have a winter build coming up so I?ve been buying parts, which included some ID1000?s. I decided to go ahead and install them. Grabbed data from Injector dynamics PDF file. Ever since then, my STFT are not doing anything I need them to, and are enjoying 30% rich and 20% lean and have seen a lambda of .64 at idle.
I?ve done my MAF transfer over 50 times. My MAF curve will end up being out of numerical order, though it does have a curve. I?ve used three GT500 throttle body calibrations and 1 posted as an actual 67mm . Checked vacuum leaks, exhaust leaks. Sent my injector data and even injectors to ID to make sure every thing was alright with those. I?ve put the stock injectors in and it worked great. I even put the ID1000?s on the stock intake manifold and got the same failing results.
Some of the tuners I?ve spoke with either didn?t know, or disappear. One even told me I don?t know how things work. They looked at my file/logs and were dumbfounded. The only way to get my STFT close to acceptable was by opening my throttle body min. I could get within 5% of STFT. The next day, I went out there to do a little more tuning, and it was back in it lean/rich state.
I took a few screen shots of some of what I?m talking about. I can?t go forward with my other plans because it?s like my PCM is not accepting the changes to the injectors, or my injectors need to be calibrated different than ID suggested.
I?m trying to see if any one has ever experienced something like this or has any ideas of what I could try?? Any help is great.
One of those i'm 28% rich, and then STFT goes straight to 0 and my lambda is .67. I'll get some logs posted soon
CHART.JPGCHART2.JPGgraph.JPGinjector_data.JPGrich.JPG