XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Rochester valve and fuel smell

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  #21  
Old 02-22-2022, 01:51 PM
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Originally Posted by alpecsa
Have a look:
https://youtu.be/BSWUZa4CbGA
Alfredo

thanks for that
 
  #22  
Old 02-23-2022, 03:25 AM
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Greg, I've blown the brether line through this morning that's clear. Managed to test the rv and that seems ok. Smell of fuel has greatly dissipated but still a faint wiff. Not sure if that's just legacy odour and will go fingers crossed. Just to be 100% sure, should the pipe that goes from the rv to the underside of the car, be connected to the outlet on the same side as the vac pipe. Previously when wriggling about under the car I noticed a wiff of fuel in that corner where the breather comes out and thinking about it , I haven't noticed it since I've had the problem in the boot. Hopefully it was that blockage.
 
  #23  
Old 02-23-2022, 04:20 AM
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Originally Posted by brinny
Greg, I've blown the brether line through this morning that's clear. Managed to test the rv and that seems ok. Smell of fuel has greatly dissipated but still a faint wiff. Not sure if that's just legacy odour and will go fingers crossed. Just to be 100% sure, should the pipe that goes from the rv to the underside of the car, be connected to the outlet on the same side as the vac pipe. Previously when wriggling about under the car I noticed a wiff of fuel in that corner where the breather comes out and thinking about it , I haven't noticed it since I've had the problem in the boot. Hopefully it was that blockage.
Briiny
The single spigot goes to the outlet. The side with two spigots is for the inlet from the tank/canister and the vac pipe (the smaller top pipe).
 
  #24  
Old 02-23-2022, 04:59 AM
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Thanks lol
 
  #25  
Old 02-25-2022, 05:28 AM
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I have just done a double check on the rochester valve. I used a large syringe to apply vac. With this on I could suck and blow . I had to hold the syringe open as it was trying to suck it back in. It seemed it had quite a pull on the syringe to say it works at 2 psi. Do you think all this sounds like it's working OK? Thanks
 
  #26  
Old 02-25-2022, 07:02 AM
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Yes that is to spec, BUT the tank should be able to breath OUTWARDS engine off (ie no vac). If you cannot blow outwards with no vac the valve is faulty.
 
  #27  
Old 02-25-2022, 08:13 AM
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I can blow out Greg without vac, but it's not like blowing through a pipe there is a bit of resistance. Does that sound right?
 
  #28  
Old 02-25-2022, 09:17 AM
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Yes, sounds right.
 
  #29  
Old 03-04-2022, 10:06 AM
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Greg, I found a new Rochester valve on eBay at a good price. However it has the outlets marked up opposite to the ones we use. I’ve fitted as per the markings. I’ve read on jag lovers others have used these. Will it be ok do you think? Also while not easy to blow through it did seem easier than my old one.
 
  #30  
Old 03-05-2022, 03:31 AM
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Brinny
As long as it works as it should when fitted (ie allows air in under vac and out with no vac and only mild pressure) it will be OK.
 
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