well it seems no matter what i do i can only hit about 14 psi.......i have a forge unos.......took it apart to make sure the ball wasnt stuck...it was fine......also i took the vacume line off off the wastegate and still the exact same boost......any help would be appreciated....

 

Hey man--what do you have in terms of a boost controller? Are you running an MBC, EBC, or using the ECU?

How's FWB looking nowadays? I used to be stationed there between 1998 and 2003.

 

fwb is great.......alot of evos in the area.......

 

bump any help here.......im thinking it has to be the wastegate actuator but just want a second opinion....

 

bump...i got a forge wastegate and still the same boost.....even when runnin open wastegate...turbo has no shaft play....what else could it be?

 

block the hole in the vac line of the line to the turbo and line to the wastegate....

it should boost 30 pounds..... just give partial throttles... dont go wot too long...

basically just to test to see if its the mbc if u dont have another one to swap...

a zip tie usually works.. or if u get couple large screw and just screw them into the vac line.

cheers!

 

already ran open wastegate...still the same boost........i swapped out all my lines with new ones and even swapped MBCs with a friends and its still the same boost..so its not the wastegate, lines to mbc or the mbc...what else could it be?

 

Leaky BOV? Leaky IC ?

 

ok now its starting to studder under boost...its hitting 18 psi and it goes lean also....13.9 afr soooo im guessing there has to be a leak somewhere....

 

Well since its really lean at 18psi, mabye your line to your fuel pressure regulator came off causing a leak, hence why you have such low boost. Do a boost leak test.

 

i checked all my lines......ill do a boost leak test when i get a chance....but i dont think i have any, if i do...none big enough to cause this

 

think i found my problem......the vac line T i have under my center console was rotted out really bad........ so my gauge was reading off under boost......and the studdering was from over boosting.......good thing i didnt get on it much.......

 

Good to hear!

What were you boosting to get the studdering I wonder?

 

probably like 26++ ha ha

 

Just an FYI for future reference: 14.7:1 (air to fuel) is the ideal AFR, any number UNDER that is rich and any numbers above that are more lean.

Therefore you were getting richer at higher RPMS and boost--which is typical. Glad you got things sorted out though!