Hi everyone. I've been fixing up minor problems with my s3.. Coilpacks were constantly going, so I replaced with hitachi screwed ones. Only bought 3 of them because they only had 3 in stock, I'm waiting for the next one to get it next week.. currently 3 hitachi and 1 push down. Did the n249 bypass also, but when I started the car, there was a huge sucking noise, dv fluttering without reving and horrible idle, it turned down to be the vac lines under the inlet mani that were all broken. Replaced them with fuel pressure hoses, all of them. Now, the car is spiking to 21psi and then goes down to 15-16, but some times, in 2nd gear in full throttle from like 2000rpm, when the car hits full boost, it seems to hesistate, no misfire, but it's like lack of power. Sometimes it just goes straight into limp mode.
I connected my vag com and it says about the egt sensor implausible signal (Been like that for awhile), evap sys incorrect flow (No idea what this is) and charge preassure upper limit exceeded.
What should I check? Could be a faulty n75? Or maybe the stock dv isn't holding that much psi?
Car is a 2003 S3 BAM 225 with cone filter and decat, n249 bypass, not chipped.
Any help would be appreciated.