different boost readings in each gear, ???

[cfisher]

don't know what to think. have a tial 38mm external wg/external dump so i should not be having boost creep. 3" turboback/no cat/. WTF is going on.

1st gear (20psi)
2nd gear (18psi)
3rd,4th,5th gear (16psi)

i would like to push 18psi in all gears.
i also have a MBC installed. could it be this or am i looking in the wrong place.

anyone out there that knows, please help me out on this one.

 

[boostedinaz]

What kind of BC do you have? Some of the bleeder type will do that. If youhave a ball and spring I would look for leaks in the vacuum hoses to see if that could be causing it to get a weak signal.

 

[cfisher]

it's a ball/spring. i've gone through all my lines and cannot find a leak anywhere. i'm wondering if it's my egr blockoff.

 

[00 Agent]

A crack in the exhaust mani could cause that due to the loss of heat...

 

[cfisher]

i've got a ss tubular manifold so i know it's not that. will an exhaust leak anywhere cause that though.

 

[cfisher]

still no solution. i went through all my vac lines, egr blockoff is good, manifold is perfect, no exhaust leaks. i'm stumped. i can only think my MBC is screwed. any other suggestions.