Car does idle, although I had a huge headache getting it to pass emissions due to high HC's a few months back.
I don't know what PSI4 is measuring, the fuel pressure looks low according to the transducer, but the autometer liquid filled gauge shows 40 line off.
Pumps are probably 3-4 years old, not more than 1500 miles, its a racetronix DP set up, I've tried swapping the primary/secondary pumps and it didn't help. They're hotwired directly off the back of the alternator. MAF seems to read high when throttle is closed, Eric @ TT had noticed that, but I tried a different LS1 MAF today, and although it seemed a tad bit better (Or maybe just wishful thinking) its nearly the same. It does hit 255
Other background, the 80# injectors have less than 300 miles back from Steve @ Full Throttle for cleaning, one is brand new since one of mine was flowing 10-15% more at idle-2500rpms. Tried swapping ECMs. Cam sensor doesn't have 500 miles on it after being rebuild by Scot. Primary O2 sensor is heated, but it also has around 300 miles on it, it gets its power from the EGR harness, but I can disconnect that to see if it effects anything. The FP transducer gets its power from the TPS harness...TPS is linear, but I'll swap it for one a friend lent me, and I can try disconnecting the transducer.
Only things left I'm thinking of trying is a friends translator, then a stock style MAF (no translator), then a stock coil pack/ign module. If it's still the same from there, I'll swap to a friends 60# injectors and his matching chip. From there I don't know what I'll do. I have to leave town for work, so it'll be a couple weeks before I can try all this