How do you remove the fuel rail? (Trying to get the injectors out for cleaning)
Do you loosen the nuts at the fuel pressure regulator and fuel-in port?

 

There are also a few bolts holding it to the intake. 4 if I remember correctly.

 

Thanks Scarecrow. I have removed those bolts, but the nuts seemed real tight and wanted to make sure i won't be breaking things. I will work on loosening the nuts at the input to the rail and at the fuel pressure regulator.

 

Ocean, before you attempt to take out the fuel rail, make sure the engine has not been use for at least 2 to 3 hours, to reduce temperature and fuel pressure from the rail.

1. Take the 3 small bolt out attach on the manifold
2. Use proper back wrench and a counter wrench when loosening both fuel regulator and the fuel supply line and make sure you do not force your wrench that may misaligned the tubing. CAUTION, make sure to place some rugs underneath the fuel regulator and fuel in line expect some fuel to splash out of these two port.
3. spray WD 40 or any lubricating oil around each and every fuel injector
4. release all electrical socket attach to the injector.
5. pull injector rail by handling even portion on left and right of rail, rocking movement would be easier to take out the rail including the injector
6 Do not release the clips holding the injector to the rail until you have pull out the whole assembly.
7 do you know how to clean the injectors the proper way?
8. make sure to have the proper O ring to replace the old one, you need 12pcs for XJ6

 

Cool, thank you for a very comprehensive procedure.
Your point on back and counter wrench made the removal of the iregulator nuts much easier and safer!

Is it better to send the inectors in for (ultrasonic) cleaning?

 

My opinion is that unless you have the tools, time and desire (from a "gee that is fun" perspective) to tear down the injectors and clean/rebuild them yourself... the $17 each price of someone like Mr Injector - Home is really the best option.

 

It would be a great experience and knowledge to clean the injector, its a walk in the park.
Have you been experiencing uneven idling or hesitation of engine when transmission is on Park (P) while stepping on the gas pedal? May i also know wht made you want to take down the injector besides cleaning?

My Principle " If its not broken do not change it ". Cleaning it would be a good practice since these cars have been on the road for too long, cleaning may also improve horse power and torque plus save on fuel consumption.

 

Cool,

Thank you for your feedback.

In regards to your question, I am at this juncture due to misfires on cylinders 3 and 4. I went through the exercise of replacing spark plugs, swapping ignition coils between good and bad cylinders, verifying signals to the coils and injectors and, doing a compression check. All looked ok, so, I figure one area to look at is the injectors. I was getting back-fires which made me think that there was fuel getting to cylinders 3 & 4 but, not enough for a proper combustion.

 

Ocean,

Sorry to join your thread so late, but for future readers who may have similar issues here are some links to photos that may help illustrate cool's written procedure.

To depressurize the fuel system before beginning the work, you just remove the fuel filler cap to relieve any pressure or vacuum in the tank, then remove the fuel pump relay, start the engine and let it run until it dies. The fuel system is now safely depressurized.


Here are photos showing the fuel rail R & R on our '93 XJ40, which, is very similar to an X300 except for the 3-screw plastic cover on the latter:

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Welcome to Jag-lovers - Members Photo Viewing Page
Welcome to Jag-lovers - Members Photo Viewing Page


I agree with Al that paying a commercial service to clean your fuel injectors is probably the better option for most folks, but here's how I did it at home:

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Welcome to Jag-lovers - Members Photo Viewing Page


The fuel injector electrical connectors become brittle with age. If one breaks while you're disconnecting it, it's not hard to replace (they are standard Bosch EV1 connectors available from most injector vendors, race shops, etc.):

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Welcome to Jag-lovers - Members Photo Viewing Page


Cheers,

Don

 

I needed the same thing...find the miss...looked to be no. 2 ...so I lifted the wire tray up and removed the 8mm nuts holding fuel rail.also the two nuts holding the pressure reg.and ..I found I could actually access the injectors on the end without taking the rail out. now, I need a tool to separate the injectors from rail and manifold intake... my manual is in the mail..?