Hi everyone, it has been a while since I have been on the forum, but I have since re-caught the modification bug and have had a wellycooler FMIC, deleted the carbon canister and had a custom made full turbo back exhaust with a 2 & 1/2 inch down pipe and 200 cell sports cat (which sounds awesome).
anyway, the ideas for doing these mods have been born from trying to get my remapped car feeling remapped again. I have consistently had the code "17963/P1555 - Boost Pressure Control: Upper Limit Exceeded" over the past year or so keep popping up. This results in the car going into limp mode when putting my foot down, I can feel it hold back, then sometimes the power suddenly comes back.
I have an AUM, you can see what other mods I have in my signature (quite a lot), there are no boost leaks in the silicone pipes, as all have been changed except for the hard plastic bit with the grey cover that goes to the actuator. The actuator is set at 2 turns and a bit of pre-load. I have tried 3 turns and 1 & 1/2 turns. None of which make much difference.
Possible reasons?
1. I still have the N112 valve hooked up, could this be the cause of the code and going into limp mode if it is not working properly?
2. N75 valve. I originally had a C valve, I replaced it with an E valve from TPS. The other day I put the old C valve back on and after 2 days the code came back and made the MIL show up on my dash. Before now the MIL light wouldn't show up, but the code would still be there. Could both N75 valves be at fault? I am not sure if the E valve is the right one for my car because the original was a C. Should it be the F valve I use?
R-Tech suggested to me it was the N75, but also suggested I ask on the forum as it sounds a bit puzzling if its not the N75 valve. So I am asking what people think, especially about the N75 valve, or if they have another idea what could be causing this problem. I really need to sort this because I want to go stage 2 with R-Tech.
