I've noticed you mention "" We and or Our "" Can I look forward in newer videos that you tell us the different names of the voices speaking to you. It's always nice and uplifting to see a schizophrenic functioning in society.. 👍
Great video. For the revised purge system, the charcoal canister should have 2 x valves that connect to the top B bank throttle taps. This is a deliberate design to ensure that the valves open and the system purges when the butterfly opens at certain angles and there is vacuum. If your car is equipped with a purge solenoid, trace the wires, I won’t be surprised if it’s connected in parallel with the supplementary air valve near the bank A airbox.
Hi, very good info, thanks. A couple of years ago when I was doing up the engine bay and surrounds, I removed the canister as I was told it was not necessary.. After doing some extra research and some reading of Palms book, I realised that I'd made an unwise decision and accordingly replumbed the canister valve however I placed the Rochester valve on the engine side in lieu of the tank side. To this point in time I have had no problems. Keen to hear your thoughts. KUTGW
I would say the only issue would be you will vent more vapors into the canister with this setup, which may simply result in some venting out the top of the canister. I doubt it would overwhelm the carbon element within but it will prob get more vapors accumulating. In reality though, how much? The reason I say this is the the valve also does serve as a check valve and only opens when tank pressures go slightly up. With the valve on the engine side that slight restriction between the tank and canister is no longer there meaning vapors will always "meander" in with no check valve. Again though, would this really be an issue? Probably not but it's probably a consideration why it's between the tank and canister, to manage overall vapor flow and also spot fluid in some cases if the tank is highly over filled (though on Jag they do have a vapor separator on the tank which probably makes getting raw fuel into the vent line not something that should happen) Anyway in your config its really acting like a second purge valve - only ever opening when vacuum is applied as the canister has a top vent and this should never really hit the 2psi. I do believe as such there is a reason the Rochester valve is between the tank and canister, and it's prob prudent to put it back that way. But in the meantime the biggest harm I could see would be over saturation of the carbon in the canister and potentially vapor smells from it. But you should have no issues with tank pressures since it's effectively an open vent to the canister. Hope this helps and isnt too disjointed a reply, typing it out on my phone as I think about it 😎. Cheers!
Hopefully this video sheds some light on where to find the vent system. Being a 1991 it should be post recall and this have the Rochester valve up above the tank, RH side. The Rochester valves can fail so maybe simply need a replacement. Just take care to install with the CAN and TANK sides correct as some valves have them reversed.
I've noticed you mention "" We and or Our ""
Can I look forward in newer videos that you tell us the different names of the voices speaking to you. It's always nice and uplifting to see a schizophrenic functioning in society.. 👍
Great video. For the revised purge system, the charcoal canister should have 2 x valves that connect to the top B bank throttle taps. This is a deliberate design to ensure that the valves open and the system purges when the butterfly opens at certain angles and there is vacuum. If your car is equipped with a purge solenoid, trace the wires, I won’t be surprised if it’s connected in parallel with the supplementary air valve near the bank A airbox.
Great video. I have an XJ12 with 2 tanks and this is an interesting fix. Thanks for posting.
Very nice, in depth video 👍
Hi, many thanks for this. Do 1984 V12 Coupes have a charcoal cannister please?
Hi, very good info, thanks. A couple of years ago when I was doing up the engine bay and surrounds, I removed the canister as I was told it was not necessary.. After doing some extra research and some reading of Palms book, I realised that I'd made an unwise decision and accordingly replumbed the canister valve however I placed the Rochester valve on the engine side in lieu of the tank side. To this point in time I have had no problems. Keen to hear your thoughts. KUTGW
I would say the only issue would be you will vent more vapors into the canister with this setup, which may simply result in some venting out the top of the canister. I doubt it would overwhelm the carbon element within but it will prob get more vapors accumulating. In reality though, how much?
The reason I say this is the the valve also does serve as a check valve and only opens when tank pressures go slightly up. With the valve on the engine side that slight restriction between the tank and canister is no longer there meaning vapors will always "meander" in with no check valve. Again though, would this really be an issue? Probably not but it's probably a consideration why it's between the tank and canister, to manage overall vapor flow and also spot fluid in some cases if the tank is highly over filled (though on Jag they do have a vapor separator on the tank which probably makes getting raw fuel into the vent line not something that should happen)
Anyway in your config its really acting like a second purge valve - only ever opening when vacuum is applied as the canister has a top vent and this should never really hit the 2psi.
I do believe as such there is a reason the Rochester valve is between the tank and canister, and it's prob prudent to put it back that way. But in the meantime the biggest harm I could see would be over saturation of the carbon in the canister and potentially vapor smells from it. But you should have no issues with tank pressures since it's effectively an open vent to the canister.
Hope this helps and isnt too disjointed a reply, typing it out on my phone as I think about it 😎. Cheers!
I have a 91 coupe that needs venting help.
Hopefully this video sheds some light on where to find the vent system. Being a 1991 it should be post recall and this have the Rochester valve up above the tank, RH side. The Rochester valves can fail so maybe simply need a replacement. Just take care to install with the CAN and TANK sides correct as some valves have them reversed.