I have installed an NOS direct port setup on my 95 GLE. I have been tweaking for a week now. I have installed different combos of jets on both the fuel and the N2O side. I have tried the 25/16, 24/18, 23/18. When the system is engaged (at WOT), the car loads up on gas and doesn't want to run right. No matter what jet combo I use the car acts exactly the same which leads me to believe that there is a single problem I'm overlooking causing this. I have a Stillen FPR and it's set at stock settings of 34psi idle/ 43psi off vaccum. I have tried upping the N2O and lowering the fuel jets (kinda dangerous) and still the same (the 25/16 scenario). I really think that it is something that I'm not doing correctly causing this. BTW, I also have a PR CAI, WS Y, 2 steps colder NGK coppers, and Walbro 255 pump if that makes any difference.
Now you know the whole scenario. Someone please please help me. I have got to get this running right before Friday. Someone has suggested that I need to get some additional regulator that regulates the pressure at the solenoids directly. Not so sure about that since noone else running DPI is using that. Please someone give me some suggestions on what to tweek on to fix this. I'm tired of ordering jets @$6/ea and not getting any results. I have just ordered a new set of solenoids to check and see if maybe I have a malfunctioning N2O solenoid (even though it's doubtful, but I'm willing to try anything at this point).
Now you know the whole scenario. Someone please please help me. I have got to get this running right before Friday. Someone has suggested that I need to get some additional regulator that regulates the pressure at the solenoids directly. Not so sure about that since noone else running DPI is using that. Please someone give me some suggestions on what to tweek on to fix this. I'm tired of ordering jets @$6/ea and not getting any results. I have just ordered a new set of solenoids to check and see if maybe I have a malfunctioning N2O solenoid (even though it's doubtful, but I'm willing to try anything at this point).
Email Thomas (sx7r) and ask him. I asked him a few questions about his setup and he said he had a similiar problem getting too much fuel, but he was also using the Walborro 255lph pump, not sure if you are or not. You might also want to ask 1max2nv since he also runs direct port. Wish I could help more, but I'll be paying attention to this thread for future plans... 
yeah jaime thats the only thing i remember reading is about the fuel pump sending too much pressure to the whole system. the only thing i can think of is with mtrai said. see if you can get a hold of thomas or tony. sorry which i could be of more help.