I put a revhard stage 2 on a 2000 civic si. For three days it ran great, it slowly felt like i was losing boost then it finally lost all boost. My boost guage is reading 30 vac. I think the intake mani gasket is blown. I have checked all hoses piping they are good. The turbo does not suck in air like it used to. When i had first put it on i could feel it pull in air now it barly sucks in air.

 

you my friend have a very big boost leak... check all of the piping connections and the intercooler

 

I have checked all the piping everthing is hooked up there are no leaks. pulled everthing off checked it all, put it back on and did the same thing. What else could it be.

 

double check the intercooler... does it have any massively large dents or dings? it could have a leak... or it could be the gasket like you said

 

Intercooler brand new no dings or dents. The thing is my boost guage is reading 30 it should be around 17-20. i cant really think of anything else.

 

is it an autometer? mine read around 20... so if its that far off you might be seeing boost but the guage wont physically show it... have any bov sounds?

also, does it seem to idle any higher than it did before?

 

Wastegate probably stuck open.

DAN

 

The bov is really quiet, the car does not pull like it did. Vac was never that high. I pulled the wastegate off. I was told to check the wastegate to see if it was easily pushable, if it was i needed a new wastegate spring. So that checked out ok.Keep throwing ideas.