For about the last 3 months I started to moniter my boost via my AP. I have come to find out that im hitting around 20 psi when I was tuned for 26. Not sure what the cause could be I checked Visualy for leaks and Im going to do a boost leak test. The car feels fine and if I never looked I wouldent have known. Any ideas on what else could be the issue? I seem to be hitting boost around 18 wot and then it goes up to about 20 instead of tapering off it seems to be incressing twards redline.

 

Does the feel of the car correspond with the AP? If i were you, i would install boost and a/f gauge to see what is actually happening. Could possibly be a boost leak if it is reading correctly.

 

My first guess would be boost leak. Spray carb cleaner around your intercooler pipes. If the idle spikes then the boost leak is where you're spraying at that moment (so do it kinda slow).