Real Fiero Tech

When I did my swap I ommited the bypass, and just sealed the flapper valve shut by using a bolt to hold it down. The car runs fine, and has been for sveral months. I wanted to put the BBV back on to get slightly better gas milage, and possibly remidy some part throttle KR. I install it back on, and all I see is a max psi of 5-6, when I usually have around 12 or so. So i guess the BBV isn't closing fully. The first thing I check is if the internals of the BBV are ok, and they are, they hold vacuum, and pressure.

The thing I didn't use was the BBV solenoid that is attached to the side of it, I just bypassed it alltogeter. Do I need the solenoid for it to function corectly? I didn't wire in the BBV Solenoid in my ECM because I wasn't going to use it.

What do you thing the problem is?

There is a lot of adjustment in those bolts. Are you sure that the BBV is locking down when there is no vacume? We put the BBV back on one of the 3800sc this weekend and have it running solely on vacume. It works perfectly.

Its easy to put a vac hand pump on it to see if it opens fully without binding, then release the vac and it should slam against the stop. You might have your BBV/bracket adjusted too high???