So replaced my bov yesterday with an evo 9 bov and now i have no vacuum coming from the throttle body.?!? Took off hoses and nothing. What does it mean. I have vacuum in the motor. ( hose going to bov has vaccum) so what's up with my car. It runs perfect still

 

On another forum it said that the throttle body might be really dirty or the spark plugs are fouled.

 

your boost gauge mechanical or electronic?if electronic and you have mechanical laying around,connect that and look what's gonna happen.

 

I have a mechanical. I tried it at different spots. I get around 20 vacuum reading if I t from my boost gauge vacuum line

 

but 20 sounds about right,i have 15-17 but i have 272's.

 

Yeah but I'm not getting any vaccum or boost readings at all from the throttle body ports. Faulty egr?

 

if it was fine before you changed bov
..might seem silly, but check if you have the bov on backwards ?

 

Haha I wish it was that simple! This is the car runs better then before lol. I went on a drive after I installed it and it the gauge was reading fine for a while. Boosting normal. Then just quit. Checked vacuum at tb and nothing. I switched my boost line to gauge so it can read at least, but it still concerns me. Is there anything that could happen?