Hello all,

I'm routing my wiring harness (I adapted from stock 2004 Avalanche). I'd like to run the harness under the fuel rail for a cleaner look but I'm not sure if all the plugs will fit underneath so I can snake it through. I've considered removing the fuel rail so I can put the harness under there, but I've never done that before. Would I potentially be opening a can of worms? Is it best to leave a fuel rail alone if it's not currently a problem?

Thanks,

 

If the fuel rails have never been off maybe you need to buy O rings for the injectors before you start. To remove the fuel rails just undo the 4 bolts and lift them off. May have to pry just a bit but no big deal to remove the rails and injectors.

 

Pop it off and put it back back on,just make sure none of the o-rings fall off and check for leaks when you are done.

 

might even be a good idea to take it off and drain the old gas out if there's some still in there. if the o-rings are a little sticky i just spray some oil in there and work them around a little and they come out easier and i think are less likely to get damaged. the o-rings don't like carb cleaner though in my experience.

 

The o rings are 14 years old, so they have probably become hard and may not seal properly, so I would replace them if you remove the rail.

 

Thanks guys. I think if that's the case, since I already have 100 things going on at once, I'll wait to get the car finished and sorted out before I remove the fuel rails.