I've replaced a bunch of injector o-rings on various Chrysler vehicles, pull the rail with all the injectors at once... it is much easier and you're much less likely to tear an o-ring in the rail.
Smear some wheel bearing grease on the o-rings prior to reinstalling the rail w/ all fuel injectors on it, just don't glob it on because you don't want to plug the fuel injector pintles.
As for relieving pressure, there should be a shrader valve on the rail somewhere IIRC, remove the cap and press the valve to relieve pressure. Watch you don't get it in your eyes, it burns.
Another way to relieve pressure without the shrader valve is to pull the fuel pump relay and then try to start your Jeep. It may run for a second or two, but this will basically deplete the pressure from the rail.
SOLDThe lumbering steel-laden pig
- 2003 TJ - 40" LTBs - D60/D70HD - 5.86s - Detroit lockers - 110" wheelbase
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Originally Posted by 2006 Sport
Being able to make vroom vroom noises in Tonys Jeep was the highlight of my life.