on the top of my secondaries for that holds them closed. I looked through Cliff R.s book and only see them on the odd one but can't find any notation for it or its use or how it works. On my old q jet this piece wasn't there . It is just above the vacuum and the secondarys won't open because of it?
On top are the secondary AIR VALVES. There is long link, connected to the primary vacuum break, that holds the air valves closed while the engine is running at idle. That is normal. The secondary THROTTLE BLADES open as you floor the gas pedal, unless the choke is on. There is a secondary throttle lock out tab that prevents the secondary throttle blades from opening when the choke is on. If you are working the throttle, trying to make the AIR VALVES open, you won't see that. The engine has to be under load.
"Hinged" piece of steel? Sounds like the poster may be describing the 65-66 carburetors secondary system, that used a hinged steel part on the drivers side airflap to dampen the secondaries. A pic would be nice for these discussions......Cliff
Should be a 70 Q-jet Cliff. See this thread, http://www.v8buick.com/showthread.p...u-have-your-idle-screws-backed-out&highlight= I've tried to help him. Not sure I have.
Thanks for the replys, . My car is in the shop getting a safety, I hope, but when I get it back I will post the carb #'s. I beleive the carb is for a 69 which is period correct for my 70. The hinged piece of steel is on the passenger side at the front of the secondarys keeping them locked in place but you can move it easily with your finger to allow them to open.
That sounds like the secondary lockout that prevents the air valves from opening until the choke is fully open. Devon
If you're referring to the mechanism labeled "lock-out" in this image from the chassis service manual, it's as I described above. Devon
Thanks Devon , thats exactly what it is. The carb that came on the car didn't come with this though and I noticed a lot don't. Just wondering why some have it and some don't.
They all have one, but it may be in a different location. Many had them on the main casting, choke side, and they keep the secondary throttle shaft from opening when the choke is engaged......Cliff
