injector hose replacement - how to depressurize fuel
#1
injector hose replacement - how to depressurize fuel
Ok, I'm about ready to replace the EFI hoses. Since my manual hasn't show up yet, is there a link or a good description to pass along concerning how to depressurize? Kirby talks about cutting into a hose and aiming it into a container, but I'd rather have a more descriptive view of how this should be done.
Thanks,
John
1987 XJS V12, 62,000 miles
Thanks,
John
1987 XJS V12, 62,000 miles
#3
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I think the official and safest method is to pull the pump relay and crank the engine.
FWIW, I just crack one of the fuel fittings a fraction of a turn and wrap the joint with a slew of old rags to keep the fuel from spraying all over.
Usual warnings about raw gasoline, fire hazards, etc.
Cheers
DD
FWIW, I just crack one of the fuel fittings a fraction of a turn and wrap the joint with a slew of old rags to keep the fuel from spraying all over.
Usual warnings about raw gasoline, fire hazards, etc.
Cheers
DD
#4
Ok, I'm about ready to replace the EFI hoses. Since my manual hasn't show up yet, is there a link or a good description to pass along concerning how to depressurize? Kirby talks about cutting into a hose and aiming it into a container, but I'd rather have a more descriptive view of how this should be done.
Thanks,
John
1987 XJS V12, 62,000 miles
Thanks,
John
1987 XJS V12, 62,000 miles
#5
why does everyone alway say pull the fuel pump relay?? Is that not the purpose of the fuel cut-off switch??
Can you just hit the switch and try to start the engine a bit til theres no fuel left.
Btw keep plenty of water around, at least a cup or bottle nearby. If you don't know all you really need to do when you spill gasoline is douse the area with water and the fire hazard is pretty much gone.
I haven't done this before but I would say disconnect the ends of the fuel rail to depressurize and this will also let you remove it to replace all the hoses on a bench instead of cutting and replacing in the car.
Can you just hit the switch and try to start the engine a bit til theres no fuel left.
Btw keep plenty of water around, at least a cup or bottle nearby. If you don't know all you really need to do when you spill gasoline is douse the area with water and the fire hazard is pretty much gone.
I haven't done this before but I would say disconnect the ends of the fuel rail to depressurize and this will also let you remove it to replace all the hoses on a bench instead of cutting and replacing in the car.
#6
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Maybe becuase that's what the Jaguar manuals say? I dunno. Obviously I have my own methods :-)
Is that not the purpose of the fuel cut-off switch??
As designed, the purpose of the inertia switch, if that's what you're referring to, is to cut the fuel pump circuit in a crash. The button is to reset it afterwards
But you can use it as a convenient cut off switch if you like
Can you just hit the switch and try to start the engine a bit til theres no fuel left.
As I recall, subject to correction, some cars are wired so that tripping the inertia switch also incidentally disables the starter circuit
Cheers
DD
#7
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#8
Replacing fuel lines is my next (but not pressing) project on Convertible.
Had to do this on 91 Coupe and it really wasn't difficult. Taking the whole rail off and doing it on the bench is the easiest way go except trying to line up all the hoses/injectors when done....causes outburst of profanity and makes the dog jumpy :-)
Had to do this on 91 Coupe and it really wasn't difficult. Taking the whole rail off and doing it on the bench is the easiest way go except trying to line up all the hoses/injectors when done....causes outburst of profanity and makes the dog jumpy :-)
#10
Well, the inertia switch method didn't work for me, it disabled the starter from cranking (and possibly other things). So I cut into one of the front hoses, and it was fairly uneventful.
The hose that was on the injector was rated for 50 psi, and had the type of clamps that have slots on them on every hose, both on the injector and fuel rail sides. Nice. Anyway, the hose is getting replaced with 150 psi Gates hose.
Is there any reason not to paint the fuel rail (other than the connections of course). I'd like to jazz it up a bit, but don't want to pay for electroplating it with something.
Thanks,
John
1987 XJS V12, 61,000 miles
The hose that was on the injector was rated for 50 psi, and had the type of clamps that have slots on them on every hose, both on the injector and fuel rail sides. Nice. Anyway, the hose is getting replaced with 150 psi Gates hose.
Is there any reason not to paint the fuel rail (other than the connections of course). I'd like to jazz it up a bit, but don't want to pay for electroplating it with something.
Thanks,
John
1987 XJS V12, 61,000 miles
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Jonathan-W (03-25-2015)
#11
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#12
#13
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Post your question in the correct section...."X308" in your case....to increases your chances of better/faster replies :-)
Cheers
DD
#14
agreed. While its possible its in the door jamb of the drivers side like on the XJS noone here would know for sure lol.
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#18
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They are definitely not 1/4". When I replaced those two hoses I couldn't find a definitive answer on the size beforehand so I removed one and compared it to a 5/16" and a 3/8" gates barricade FI hose. Memory fails me on which one I went with, but seems like it was the 5/16". O'reilly auto parts typically has both of those hoses for sale by the foot. It's been a few years and I've had no leaks or problems.
It was quite a chore to cut the old ones off the barbs without nicking the barbs. Use a sharp exacto knife or similar and saw away gently; at some point I recall facing the blade up and cutting upwards to get through the strands in the old hose to avoid nicking the barbs.
Here's a note on the original part number and possible replacement if you want to go the route of a genuine Jaguar part:
JCNA Forums - Jaguar Clubs of North America
#20
at pressure fuel would spray all over the place.
I did it once, changing a fuel filter and it sprayed directly into my eyes. It took 10-15 minutes of flushing to get it all out. Don't learn the hard way.
I did it once, changing a fuel filter and it sprayed directly into my eyes. It took 10-15 minutes of flushing to get it all out. Don't learn the hard way.
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orangeblossom (03-26-2015)