Car has very high vacume, its at -40 when i press on the gas to speed up, it seems to pick up but falls short around 4.5k My gauge does not even go into the boost area.

im assuming there is something wrong with the vacume lines or something. Im tapping the vacume line from the waste gate with the BOV which is also tapping into another line. Could this be my problem?

thanks

 

ttt

 

My guess is you MIGHT have a VAC or Boost leak somewhere...that's just my guess though...Not much help....sorry..

 

can a vacume leake cause the vacume to be that much?

 

if your not boosting then one of your pipes are loose. Check to make sure all the pipes are connected.

 

Would that cause the vacuum to be so high/low though?

I agree, if you're not boosting, check the charge pipe connections. Do you hear the WG opening at all when you spool?

jB

 

check blow-off valve too.....

 

i hear a fluttering noise...im thinking thats the WG. The pipes are ok i just checked them.

The vacume level is at -40 cmHg is that normal?

dont get me wrong i am boosting it just feel like its no holding boost and just sorta almost like bogging at 4k then picks up near vtec

this is my setup
maxrev mani
tial WG

The boost gauge seems to read vacum but not boost...

thanks for any help guys

 

wow...when i'm not boosting my vacuum is around -25. -40 to-45 is a lot of vacuum IMO.

 

is that in on the metric scale?

 

vac is measured in inches then when in boost measured in psi......

-20 in. vac is normal at idle

check ur diaprham in ur bov if u hear fluttering....it might justbe that lil rubber piece that can be replaced.

 

is your boost gauge measuring vac in cent? or inch? autometer?

 

My boost gague is in bars.

Ok so i messed with the vacume lines again and now the vacume is at -20 the gauge is still not going about 0

 

If you are reading -40 cm/hg, then that's about -20 in/hg, which is good. When I moved my vac line for my BOV I forgot to plug another vac line and I read around -5 in/hg, which is not good. You might tap the BOV into another vac line and see what happens. It also sounds like you need to recheck all your pipe clamps to check for leaks there. Hope you find your problem!

 

yeah i hope so too...im running out of things to check

 

hey man check your pipes. my car did that too when i blew the charge pipe off the throttle body cuz i had pos clamps. car wouldn't boost and boost guage stayed in vacuum. check your IC piping that could be the culprit.

are you tapping everything off the fpr vacuum line? try the brake booster for either your wg or bov. it made worlds of difference in my bov response time and i'm sure the wg will benifit from here also. i made a tee for the brake booster line so if you want it just come pick it up whenever.