Alright so before i had an idle surge, now it idles fine but i got a check engine light and when i push the gas i see it go from vacuum to about 0 psi like its ready to build boost but it doesnt. I drove the car a few times on the back road and got on it etc. and it was fine but now its got like shit power and a check engine light.
I figure its a boost leak but before i go tearing things off and such, does anyone know if a boost leak would set a check engine light off? Also I noticed when i start the car the check engine light goes off and almost immediately comes back on. I suspect the leak to be either at the j-pipe to the turbo or on the way to the intake manifold right at the coupler to the side mount intercooler. any ideas/info? would a boost leak set a check engine light off? and since the car runs and drives still (seems a bit louder than before, but i hear the turbo spinning still) and it idles perfect would it be most likely at the j-pipe? I've heard of boost leaks making it impossible to start cars and they run like shit etc. but mine starts a little harder than before and idles pretty normal.
any info is greatly appreciated as always
Ben