B4 doing anything, check this valve. Its the one in between the 2 banjo bolts (one at the intake manifold and one at the ALDA). The valve is located at the firewall right behind the brake booster.

This baby gets plugged up with soot and so do the banjos and possibly the lines connecting them. When they do, kiss your turbo boost goodbye.

Its a simple, no cost fix in case its the problem. With mine, thats all it took. I used brake cleaber spray to get the junk out.

The valves may need adjustment regardless since its suppose to be done every 15k miles. The changeover valve should also be checked every 5k miles or sooner once it gets sluggish.

__________________
the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa