vapor canister for a '71
#21
Drifting
charcoal
I've read a few threads related to this and I'm still a bit confused. So I went ahead with taking mine out to do a "refresh". Here's what I saw:
After removal, just the one hose from the fuel tank:
The plastic vapor canister:
The top of the vapor canister where the 3 connections are:
removed the filter from the bottom:
The connections on the carb:
I saw one thread where the guy had replaced charcoal inside with fish pet supply grade charcoal. To me, the vapor canister seems sealed as in there is no way to open it. Is that true? To replace the inside do I have to cut off the top or bottom to fill it, and if so, how do I go about "gluing" it back together?
As for the connections, right now it's not connected to the carb or PCV like it should be. Is this pretty common? I've looked at my AIM and on page L218 it shows how the connection should be. You can see my connections on my carb above, that's pretty much how I found it when I bought it. I have no idea if I'll have gasoline smell as I have yet to drive the car, much less start it more than twice since I've had it.
FYI - don't assume anything is correct with my car, Bubba had his grubby mits all over. The carb could be original, or from a different year all together. If tubes are missing, that would be Bubba.
Oh yeah, my car is a SB 350ci/270hp that came with manual tranny (is now a TH400 auto).
After removal, just the one hose from the fuel tank:
The plastic vapor canister:
The top of the vapor canister where the 3 connections are:
removed the filter from the bottom:
The connections on the carb:
I saw one thread where the guy had replaced charcoal inside with fish pet supply grade charcoal. To me, the vapor canister seems sealed as in there is no way to open it. Is that true? To replace the inside do I have to cut off the top or bottom to fill it, and if so, how do I go about "gluing" it back together?
As for the connections, right now it's not connected to the carb or PCV like it should be. Is this pretty common? I've looked at my AIM and on page L218 it shows how the connection should be. You can see my connections on my carb above, that's pretty much how I found it when I bought it. I have no idea if I'll have gasoline smell as I have yet to drive the car, much less start it more than twice since I've had it.
FYI - don't assume anything is correct with my car, Bubba had his grubby mits all over. The carb could be original, or from a different year all together. If tubes are missing, that would be Bubba.
Oh yeah, my car is a SB 350ci/270hp that came with manual tranny (is now a TH400 auto).
#22
Thanks for the info and the new link to the jeep canister rebuild. I think between that info and what I found from a guy in Australia who rebuilt his Corvette canister, I'll go the rebuild way
#23
Just in case I'm not successful, do you have the P/N (or what vehicle it fits)for the NAPA canister. I looked at their website and there seem to be a lot of options. Thanks
#24
I've read a few threads related to this and I'm still a bit confused. So I went ahead with taking mine out to do a "refresh". Here's what I saw:
After removal, just the one hose from the fuel tank:
The plastic vapor canister:
The top of the vapor canister where the 3 connections are:
removed the filter from the bottom:
The connections on the carb:
I saw one thread where the guy had replaced charcoal inside with fish pet supply grade charcoal. To me, the vapor canister seems sealed as in there is no way to open it. Is that true? To replace the inside do I have to cut off the top or bottom to fill it, and if so, how do I go about "gluing" it back together?
As for the connections, right now it's not connected to the carb or PCV like it should be. Is this pretty common? I've looked at my AIM and on page L218 it shows how the connection should be. You can see my connections on my carb above, that's pretty much how I found it when I bought it. I have no idea if I'll have gasoline smell as I have yet to drive the car, much less start it more than twice since I've had it.
FYI - don't assume anything is correct with my car, Bubba had his grubby mits all over. The carb could be original, or from a different year all together. If tubes are missing, that would be Bubba.
Oh yeah, my car is a SB 350ci/270hp that came with manual tranny (is now a TH400 auto).
After removal, just the one hose from the fuel tank:
The plastic vapor canister:
The top of the vapor canister where the 3 connections are:
removed the filter from the bottom:
The connections on the carb:
I saw one thread where the guy had replaced charcoal inside with fish pet supply grade charcoal. To me, the vapor canister seems sealed as in there is no way to open it. Is that true? To replace the inside do I have to cut off the top or bottom to fill it, and if so, how do I go about "gluing" it back together?
As for the connections, right now it's not connected to the carb or PCV like it should be. Is this pretty common? I've looked at my AIM and on page L218 it shows how the connection should be. You can see my connections on my carb above, that's pretty much how I found it when I bought it. I have no idea if I'll have gasoline smell as I have yet to drive the car, much less start it more than twice since I've had it.
FYI - don't assume anything is correct with my car, Bubba had his grubby mits all over. The carb could be original, or from a different year all together. If tubes are missing, that would be Bubba.
Oh yeah, my car is a SB 350ci/270hp that came with manual tranny (is now a TH400 auto).
#25
Can you send me the scematics and any other information about the CEC, I'm rebuilding a QJ and like to keep it original as much as possible for my 454 1971 with automatic transmission. It's confusing some called it Transmission Controlled Spark, some is talking about Spark Control sollenoid and now Combined Emission Control, Thanks
#26
Can you send me the scematics and any other information about the CEC, I'm rebuilding a QJ and like to keep it original as much as possible for my 454 1971 with automatic transmission. It's confusing some called it Transmission Controlled Spark, some is talking about Spark Control sollenoid and now Combined Emission Control, Thanks
#27
We may not be talking about the same thing. What I rebuilt is the charcoal canister that is located under the driver side from fender. The canister cannot be purchased now but can easily be rebuilt. The filter element at the bottom of the canister can be purchased thru NAPA. If this is what you were referring to, let me know and I'll dig out the info. VETTE magazine recently had an article on rebuilding these, too.
#28
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Hi V454,
"Can you send me the scematics and any other information about the CEC, I'm rebuilding a QJ and like to keep it original as much as possible for my 454 1971 with automatic transmission. It's confusing some called it Transmission Controlled Spark, some is talking about Spark Control sollenoid and now Combined Emission Control."
The "Combined Emission Control" (CEC) system was used during the 71 model year production.
The system used during the 70 and 72 model years was called "Transmission Controlled Spark" (TCS) system.
The CEC system consists of:
A vacuum/electrical solenoid mounted on the left front of the carburetor.
A delay relay mounted on the firewall.
A reversing relay mounted on the firewall.
A temperature sensor/switch mounted in the right side head between the rear 2 spark plugs.
A sensor in the transmission that sends a signal when in 3rd or 4th gear.
The wiring for these components is part of the engine harness.
What information are you looking for?
Regards,
Alan
The solenoid on the carburetor.
The 2 relays mounted back to back on a small bracket on the firewall.
The temperature sensor/switch.
The sensor on the transmission. (4speed)
The location for the sensor on your automatic transmission is shown in the Assembly Manual.
"Can you send me the scematics and any other information about the CEC, I'm rebuilding a QJ and like to keep it original as much as possible for my 454 1971 with automatic transmission. It's confusing some called it Transmission Controlled Spark, some is talking about Spark Control sollenoid and now Combined Emission Control."
The "Combined Emission Control" (CEC) system was used during the 71 model year production.
The system used during the 70 and 72 model years was called "Transmission Controlled Spark" (TCS) system.
The CEC system consists of:
A vacuum/electrical solenoid mounted on the left front of the carburetor.
A delay relay mounted on the firewall.
A reversing relay mounted on the firewall.
A temperature sensor/switch mounted in the right side head between the rear 2 spark plugs.
A sensor in the transmission that sends a signal when in 3rd or 4th gear.
The wiring for these components is part of the engine harness.
What information are you looking for?
Regards,
Alan
The solenoid on the carburetor.
The 2 relays mounted back to back on a small bracket on the firewall.
The temperature sensor/switch.
The sensor on the transmission. (4speed)
The location for the sensor on your automatic transmission is shown in the Assembly Manual.
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Primoz (01-01-2020)
#29
Hi V454,
"Can you send me the scematics and any other information about the CEC, I'm rebuilding a QJ and like to keep it original as much as possible for my 454 1971 with automatic transmission. It's confusing some called it Transmission Controlled Spark, some is talking about Spark Control sollenoid and now Combined Emission Control."
The "Combined Emission Control" (CEC) system was used during the 71 model year production.
The system used during the 70 and 72 model years was called "Transmission Controlled Spark" (TCS) system.
The CEC system consists of:
A vacuum/electrical solenoid mounted on the left front of the carburetor.
A delay relay mounted on the firewall.
A reversing relay mounted on the firewall.
A temperature sensor/switch mounted in the right side head between the rear 2 spark plugs.
A sensor in the transmission that sends a signal when in 3rd or 4th gear.
The wiring for these components is part of the engine harness.
What information are you looking for?
Regards,
Alan
The solenoid on the carburetor.
The 2 relays mounted back to back on a small bracket on the firewall.
The temperature sensor/switch.
The sensor on the transmission. (4speed)
The location for the sensor on your automatic transmission is shown in the Assembly Manual.
"Can you send me the scematics and any other information about the CEC, I'm rebuilding a QJ and like to keep it original as much as possible for my 454 1971 with automatic transmission. It's confusing some called it Transmission Controlled Spark, some is talking about Spark Control sollenoid and now Combined Emission Control."
The "Combined Emission Control" (CEC) system was used during the 71 model year production.
The system used during the 70 and 72 model years was called "Transmission Controlled Spark" (TCS) system.
The CEC system consists of:
A vacuum/electrical solenoid mounted on the left front of the carburetor.
A delay relay mounted on the firewall.
A reversing relay mounted on the firewall.
A temperature sensor/switch mounted in the right side head between the rear 2 spark plugs.
A sensor in the transmission that sends a signal when in 3rd or 4th gear.
The wiring for these components is part of the engine harness.
What information are you looking for?
Regards,
Alan
The solenoid on the carburetor.
The 2 relays mounted back to back on a small bracket on the firewall.
The temperature sensor/switch.
The sensor on the transmission. (4speed)
The location for the sensor on your automatic transmission is shown in the Assembly Manual.
They installed a Holley carb and PCV ventilation together with the vacuum lines are mixed up in a big mess.
I found useful information thanks to your hints on the Service manual on how the system works but I have one question.
Could it be that this to wires shown on my pic are the ones that are connected the solenoid?
They are coming out from the cable bundle just below the second relay and are one black an the other dark yellow
#30
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#31
[QUOTE=Alan 71;1577451167]Hi sl,
Unless you just didn't show it, I believe the canister is missing it's bottom cover and drain hose.
Regards,
Alan
My Canister is missing but I'm not sure if I need the GM7028131 with 2 ports or the GM7028129 with 3 ports on my 454 1971 365HP engine
Unless you just didn't show it, I believe the canister is missing it's bottom cover and drain hose.
Regards,
Alan
My Canister is missing but I'm not sure if I need the GM7028131 with 2 ports or the GM7028129 with 3 ports on my 454 1971 365HP engine
#32
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Hi V454,
Your 71 bb car typically had the vapor canister with 3 ports in it's top.
One for the line from the gas tank.
One that runs directly to the carburetor.
One that runs to a 'T' on top of the PCV valve, and then continues to the carburetor.
Regards,
Alan
Note the 'T' at the pcv valve allows the hose to transition from a large hose FROM the canister to a smaller hose TO the carburetor. The only clamp used here at the connection is from the stub hose to the pcv valve.
Your 71 bb car typically had the vapor canister with 3 ports in it's top.
One for the line from the gas tank.
One that runs directly to the carburetor.
One that runs to a 'T' on top of the PCV valve, and then continues to the carburetor.
Regards,
Alan
Note the 'T' at the pcv valve allows the hose to transition from a large hose FROM the canister to a smaller hose TO the carburetor. The only clamp used here at the connection is from the stub hose to the pcv valve.