ok so ive been having problems with my boost it wouldnt go past 4. somepeople said it was limp mode. i got the codes read it said dirty maf. that was just because one of my intake pipes fell off. still no more than 4 psi. 4 some reason i just though to chance the n75 race valve that i had just put on about 2 weeks ago back to the stock valve. after i did that my car was back to normal aournd 16 psi. if my n75 was faulty wouldnt it throw a code?

 

it might throw a code depending on the problem. You could also have a weak DV and it just can hold boost...I had a car come it the shop the other day with kinda the same problem and the hose to the fuel pressure regulator was cracked so I guess you could check that too

 

ok yeah i guess it would help if i read the whole post

 

can anyone else explain this. and what should i do with the n75 race valve i bought from ecs. i liked it because it made my boost around 18 were i should be and spike less. should i try maybe mbc either with or without the n75?

 

i would look into a "boostvalve"
it works like a mbc but smooths out spikes better
run it without the n75 race

you should be good.. and if that dosent work try to run it set at 17psi..

id say the race valve caused over boost and sent you into limp