Sorry man I'm better at electronics than mbc's.

I'd check for simple things like the pill still being in the hose, or even test it without the mbc just to make sure it doesn't spike period

 

what pill?

 

Its a resitrictor inside the vacume line..

looks like this

http://www.vishnutuning.com/images/i.../evo_pill4.jpg


its located here
http://www.vishnutuning.com/images/i.../evo_pill3.jpg

 

BTW i found a nice thread to make sure your MBC is hooked up correctly

check out this image

 

i have the MBC hooked up a little different... i have a hose to the wastegate..and hose to the underside of my HKS intake....itss always been this way....also i used new vacume line for my boost controller...

 

bump for more info on this....

 

Can you further explain how the hose connects to your wastegate and intake?

 

my mistake... i just took the intake and uicp out of the car. the shop left one of the vac line from the stock actuator hooked up into the hks intake. the vacume lines are set up as follows:
waste gate to side port of the mbc.
pressure nipple on turbo to bottom of mbc.

is the pill on the top hose or the bottom hose comming of the stock actuator?

i have replaced the rear bulbs and my voltage is back to normal.
13.5v at idle
13.8v to 14.1v under load

 

My walbro fuel pump also makes a whining

It sounds like some sort of boost leak to me.

 

I could be wrong but isn't that backwards? If it is I'm not sure how the spring is going to react with pressure on the other side maybe it would just not let any pressure through *shrugs*

Far as the pill i believe its on the bottom hose of that picture with the red arrow showing the front of the car.

 

Good point he has there

 

the shop is telling me i have a bad wastegate

 

At least you found the culprit

Sorry i couldn't be more helpful

 

they made that asumption over the phone.... im not sure replacing it will fix my problem....

 

Id like to know the results if the mbc was hooked in backwards personally going to search it later