dbrannon79
I'm getting there!
Hey guys, I recently discovered something on my truck with the junk yard PCM from a 94 that sparked my attention. while out on the road and using my foot in the pedal I noticed my truck would get up and go, then suddenly fall flat on it's face and loose all boost pressure. I normally don't drive hard so it took me a while to notice this issue. I have also had quite an interest in learning to diy tune these old trucks. I finally got my hands on a prom programmer and all the adapters from Moates.
I pulled the prom from the 94 PCM and read the chip. prom code is BMRM 42510073 on the sticker. I opened it up in TunerProRT and started poking around.
when I opened up the boost map table my jaw dropped! this screen shot will speak for it's self...
I actually thought I had a bad read on the prom, so I re-read it several times and even tried reading it on another pc just to be sure. each time I was getting the same results. why the heck is the upper range on the APP percentage showing desired boost in the negative numbers!
I did the same read on my OEM 95 model PCM that has a BPAA 16216871 prom in it. here is the same boost table from it's data.
anyone have any ideas why the wired boost numbers?
I pulled the prom from the 94 PCM and read the chip. prom code is BMRM 42510073 on the sticker. I opened it up in TunerProRT and started poking around.
when I opened up the boost map table my jaw dropped! this screen shot will speak for it's self...
I actually thought I had a bad read on the prom, so I re-read it several times and even tried reading it on another pc just to be sure. each time I was getting the same results. why the heck is the upper range on the APP percentage showing desired boost in the negative numbers!
I did the same read on my OEM 95 model PCM that has a BPAA 16216871 prom in it. here is the same boost table from it's data.
anyone have any ideas why the wired boost numbers?