B&B fusion question
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 815
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From: Virginia beach va
B&B fusion question
I have an 08 C6 with B&B fusions on there. the valves aren't opening up I tried to pull the fuse and no go what other than the fuse controls them? what should I look at to get them to open up again? I have the Mild to wild controller. it works I hear it click but the exhaust doesn't change. I'm going to lift it up this weekend and see if I can see anything I just want to know if there is anything I need to look at before I get it up in the air. thanks for the help in advance.
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
I have an 08 C6 with B&B fusions on there. the valves aren't opening up I tried to pull the fuse and no go what other than the fuse controls them? what should I look at to get them to open up again? I have the Mild to wild controller. it works I hear it click but the exhaust doesn't change. I'm going to lift it up this weekend and see if I can see anything I just want to know if there is anything I need to look at before I get it up in the air. thanks for the help in advance.
San
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 815
Likes: 0
From: Virginia beach va
yes they worked for the first 35,000 miles and the box plugs into the fuse box where the fuse for the exhaust was. but I will check the tubing and see if it's cracked or anything
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
San
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
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Race Director
Joined: Mar 2005
Posts: 10,399
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From: Austin Texas
I have an 08 C6 with B&B fusions on there. the valves aren't opening up I tried to pull the fuse and no go what other than the fuse controls them? what should I look at to get them to open up again? I have the Mild to wild controller. it works I hear it click but the exhaust doesn't change. I'm going to lift it up this weekend and see if I can see anything I just want to know if there is anything I need to look at before I get it up in the air. thanks for the help in advance.
When the car is off the valves should be open, once the engine starts the engine vacuum closes the valves UNLESS you open them with your controller. Something is mechanically wrong with the valves, they may be wedged closed or jammed.
Try pulling the vacuum lines off the valves, if the valves open then somehow the vacuum is holding them closed. If the valves don't open when you pull the vacuum lines then you have a mechanical problem with the valves.
Burning Brakes
Joined: Sep 2011
Posts: 960
Likes: 7
From: Denton, Texas
St. Jude Donor '12
I had a similar problem on my B&B Fusions and upon performance shop diagnosis, the actuators went bad. I had them replace the actuators (~$100) and voila....fixed. Don't know if that helps but if you can't figure it out it may be something to look into
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 815
Likes: 0
From: Virginia beach va
well the valves were open I could open and close them by hand. I pulled the fuse and they just stay open now I will put the Mild to Wild back on tomorrow and see if it will open and close them if not more than likely the actuators are bad does anyone know where I can pick up a set at?
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
well the valves were open I could open and close them by hand. I pulled the fuse and they just stay open now I will put the Mild to Wild back on tomorrow and see if it will open and close them if not more than likely the actuators are bad does anyone know where I can pick up a set at?
San
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
well the valves were open I could open and close them by hand. I pulled the fuse and they just stay open now I will put the Mild to Wild back on tomorrow and see if it will open and close them if not more than likely the actuators are bad does anyone know where I can pick up a set at?
San
Race Director
Joined: Mar 2005
Posts: 10,399
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From: Austin Texas
Then yesterdays post @ 7:31PM you say you checked and the valves were open regardless of whether you had the fuse in the controller or not.
Which is it?
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 815
Likes: 0
From: Virginia beach va
orginally they were closed I manually moved them with the car off sprayed some wd40 on the shaft and it moves freely but. they don't move with the engine with the fuse in. they don't move with the fuse out. So that leads me to the conclusion that the valves are bad or the hose has a hole in it some where. and yes I have mechanical ability I fix jets for a living.
Racer
Joined: Oct 2011
Posts: 475
Likes: 3
From: Jacksonville TX
I would try checking if there is a vacuum at each of the actuators. Install the fuse and start the car. Disconnect the vacuum line from the driver side actuator and put finger at the end of the vacuum line. Is there any suction? repeat on the passenger side. The vacuum line does plug into the rear of the intake plenum. Keep us updated.
