Hello again folks. I want to change my fuel filter and in the past, I have only ever changed filters on simple carburettor motors. No whistles or bells! So, I noticed posts on here regarding de-pressurising fuel rails (or something similar!) and it leads me to wonder is there more to it than just undoing the old and replacing with the new? And yes, I'm aware of the resistance the nuts on the fuel line can offer. I will treat them liberally over a period of time to wd40 or similar!

Any thoughts much appreciated.

 

I didn't do anything special when I changed mine. A little fuel came out but I had a pan ready to catch it.

 

Thanks, that's comforting to know. I got the impression that you could get an airlock or similar if it wasn't "done right". You just never know with these complicated beasts!

Thanks again!

 

The safest and most responsible answer is "yes, depressurize first". Fuel spraying about isn't really good thing.

A half-way measure is to let the car sit a overnight before working on the fuel system as most of the pressure will have bled off. You'll still have some fuel spilling out, though, no matter how you slice it.

However.....

I never depressurize first. I simply have a couple big rags ready to absorb the gasoline. I just barely crack the fitting open (or barely loosen the hose) so the newly-created fuel leak can be controlled. When the pressure has bled off I fully loosen the fittings. I guess you could say this method incorporates de-pressurizing into the actual repair. It can get messy if you're not prepared....or if you foolishly open the fitting all at once., skipping the "barely cracking it open" part.

It depends on your comfort level. If there's any doubt in your mind, though, take the known safest course of action.

Cheers
DD







Cheers
DD

 

If you're worried, pull the fuel pump fuse while the engine is running. That should remove the fuel pressure.

 

Ill make a diy pic for.this

Will replace fuel filter and accumilator??