my se is not running smooth need help? i noticed that my bac is not connected correct. in hayes book the bac vac line is connected to a camber ,and the chamber is connected to the back side of the rail. my car has the bac to the pressure regulator control sole. valve. i have no chamber and the pipe inlet that the chamber hose connects too is pluged up. the two vac lines on the back by the firewall,(on the plenum) one goes to the purge valve. the second vac line goes the the pipe inlet that the pressure regulator sole valve should be connected too. i can't find where the secound vac line goes. also what is the chamber and what does it do? i suck at typing, so be kind and help.

 

I am not sure off, the top. I think there were some minor differences in 84 & 85. Which do you have and I'm sure someone else if more familiar. If I have to, I'll go out later to see one I have in back,, don't remember the year off hand.

 

The chamber is a 25cc air reservoir. It most likely is used to feed the BAC in situations where it needs more air than the VSV devices can deliver at one time.

The feed side of the chamber is the rat's nest (the side toward the passenger side). The vacuum solenoid valve (the round one closest to the driver) plugs into the rat's nest on the oil filter side of the engine.

You will probably need to see a FSM diagram to get it right.

jeryj

 

i have an 85. i need the help, thanks. do you know about the chamber.

 

can i by-pass the chamber. make the bac vac connect to the ratnest, where the camber would connect

 

That's what I would do until you can get some type of replacement chamber. You might check at some of the auto parts stores to see if anything they carry might be rigged for your chamber. Right off hand I'm thinking of a fishing float with spouts attached to each end. Unfortunately, as you know, whatever you use will have to be heat resistant.

I'm not really sure why your solenoids were bypassed. Maybe the previous owner thought it ran better altered.
I find it hard to believe since these SE's (I own 2 of them) idle like crap. I've spent HOURS on the most apparently simplest of things before I could get it close. I've not always succeeded.

jeryj

 

So then are you MISSING the chamber?

 

the car has no chamber?
i found out that the two vacuums on the back side of the dynamic chamber, both go to the purge valve.
i can never get the car to idle correct. i have checked everything to check and it led me to the bac vaccuum.
thank you for your help. do you think the chamber is a delay valve. thanks again everyone and happy new year. i will conect the bac directly to the pipe rail and see what happens.

 

The purge valve has 2 smaller hoses. Yes, these ultimately connect to the backside of the DC via a couple of metal tubes.

The car will probably not ever idle correctly until you get the hoses correct first. Then trust me, you will have a whole list of other items possibly contributing to the bad idle. Must make sure the hoses are connected/correctly first.

The chamber is NOT a delay valve. It is hollow. It stores air for the BAC to use during idle stabilization circumstances.

Yes, connect the bac directly to the pipe rail (without the chamber) and see if it will help.

jeryj

 

oops,,,,,can't delete

 

Let me know,,,it is quite dark out now and we are expecting 8" of snow between now and noon (just started freezing rain) but I can check in the morning for something. I THINK the one I have is complete, still don't know year, if it matters?

 

i have a friend who also has a 85 se and his is on correctly. i needed to know if the chamber has an effect on the bac, from what i gathered, the chamber stores air for when the bac needs it quick. maybe i'm wrong.
thanks again, i will let you know something tomorrow when i get home from work.
i do know that everything is working.(almost everthing)
i've followed all the steps to the t(from the the epitrochoid) and i know that the pressure regulator control solenoid valve is not wroking. the (prcsv) works backwards. but the (prcsv) is for hot starts only? right! and the bac vac was connected wrong and i need a missing chamber, thanks and i will let you know when i know