Originally Posted by sw20kosh (Post 1161067)

What turbo kit do you have?

A little bit of creep should be tolerable as long as your data logs look clean of knock.

Usually this happens when your wastegate is insufficient at venting the amount of exhaust gas you are throwing at the turbo.

Also, if you have one, check your boost controller and all the lines that go to and from your boost controller and wastegate for leaks.

Originally Posted by Dipstik-sportech (Post 1161078)

What kind of boost controller are u running? Is the wastegate recirculated or open to atmosphere?

Originally Posted by sw20kosh (Post 1161727)

If you know what you are doing, disconnect the boost controller and go back to just using the wastegate. This will diagnose the problem as:

1. Boost controller malfunction
Or
2. Wastegate malfunction or leak in the boost refrence hoses

Originally Posted by Toma (Post 1161761)

What style of Vaccuum line? Cheap "silicone" rubber tends to swell and "drop" pressure. But not usually till higher boost.

Keep the Vaccum lines as short as possible. Avoid "T's" that reduce inside diameter or are a restriction.

I usually plumb the turbo compressor housing direct to wastegate.

If it still does it....

Then either the wastegate has insufficient flow, or if the turbine section is restrictive, the timing could be too low (creates excess heat energy, has greater affect on small housings).

But I like boost creep, 2-3 pounds is very nice ;)