casualty
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Intermediate
Joined: Mar 2011
Posts: 29
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From: San Marcos Ca
casualty
My gorilla fingers snapped off another crunchy old plastic part. It's the solenoid that goes from the vacuum advance then to the AIR system. Can anyone decipher this description and shed some light?
73 350 with quad jet part mounted behind water neck has elec plug one end 2 hoses coming out other end
Thanks!!
73 350 with quad jet part mounted behind water neck has elec plug one end 2 hoses coming out other end
Thanks!!
Drifting
Joined: Mar 2011
Posts: 1,886
Likes: 9
Chevrolet used a Transmission Controlled Spark advance system that only allowed vacuum advance when the engine was cold, or a manual trans was in 3rd or 4th gear. There was a thermal vacuum switch on the thermostat housing, an electrical switch on the 3/4 shifter lever on the trans, a solonoid valve on the vacuum line between the carb and distributor, and the interconnecting hoses and wiring.
The Air Injector Reactor consisted of the engine driven air pump, the vacuum control valve bolted to the back of that, and the hoses and pipes to connect to the exhaust manifolds. This pumped extra air into the hot exhaust gases to completely burn any gasoline that might have passed through the cylinders.
Perhaps at this late date, something has become cross connected on your engine.
The Air Injector Reactor consisted of the engine driven air pump, the vacuum control valve bolted to the back of that, and the hoses and pipes to connect to the exhaust manifolds. This pumped extra air into the hot exhaust gases to completely burn any gasoline that might have passed through the cylinders.
Perhaps at this late date, something has become cross connected on your engine.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
one of my car friends in Cleveland was a pipe fitter.....you never wanted him to wrench on your car, he would breqak everything....
Racer
Joined: Sep 2003
Posts: 263
Likes: 20
Spark Control Solenoid. Different part number for auto trans / MT.
Original GM part numbers:
350 w auto trans: 1997425
350 w MT: 1997410
Doc Rebuild has them....http://www.docrebuild.com/dr-r-web/CARB-VAC.pdf
Original GM part numbers:
350 w auto trans: 1997425
350 w MT: 1997410
Doc Rebuild has them....http://www.docrebuild.com/dr-r-web/CARB-VAC.pdf
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Spark Control Solenoid. Different part number for auto trans / MT.
Original GM part numbers:
350 w auto trans: 1997425
350 w MT: 1997410
Doc Rebuild has them....http://www.docrebuild.com/dr-r-web/CARB-VAC.pdf
Original GM part numbers:
350 w auto trans: 1997425
350 w MT: 1997410
Doc Rebuild has them....http://www.docrebuild.com/dr-r-web/CARB-VAC.pdf
