I was just wondering if anyone would have any clue as to y my 98 ssei boost has suddenly dropped from 8 or 9 pounds of boost to 3 or 4 ive checked the sc belt vaccum lines and replaced a few sensors and still im unable to figure out the problem. But the car runs fine it just lost alot of top end power!!! HELP HELP HELP

Could be the BCS (boost control solenoid). Find the black cylinder on the SC with two vacuum lines running to it, one to the top and one to the bottom. Pull the vac line off the bottom post and take it for a spin. Report back.

Most likely the problem is your boost control solenoid. I believe they are about $30 from GM parts direct.

well i just took off the bottom line and took it for a ride and the boost was normal so i take it was the boost soleniod is shot.... now should i leave it pluged in until i get a new one or could i take the line off...and all i need is the black canister right? Thanks so much ive been trying to figure that out forever!!

well i wasent able to find a boost control soleniod on the gm direct part site so i called a dealer and they told me i need an actuator kit? and that there is no such thing as a boost control solieniod is there another name for it?

That dealer needs to do their homework.


http://www.bonnevilleclub.com/forum/...hlight=bca+bcs

You need the BCS. Not the Actuator. Should be about $30.