Gas line on fuel rail hose [Archive] - Forum


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05-07-2012, 01:35 PM
I can't remember whickh one was the pressure regulator but the fuel line that connects to the fuel rail closest to the firewall, when i pulled it out it had no o-ring on it,is that right?

05-07-2012, 02:16 PM
Found it

There should only be one O-ring each on the FPR where it goes into the front fuel rail, and on the supply line going into the rear fuel rail. It is very common for the O-ring on the supply lines to get cut on the threads inside when people pull them out, or for the o-ring to fly out and/or get completely lost and sometimes people don't even realize there was an o-ring there. Leaks are quite common at that rear line because of this.

I always recommend having one of those o-rings on hand when servicing the fuel system, just in case. GM dealership will charge you $10 for that o-ring, but you can find the same one along with a bunch of others in an o-ring pack at the auto parts store for around $2

05-07-2012, 02:19 PM

05-07-2012, 06:14 PM
Yeah....that O-ring is a PITA. I learned the hard way to always turn the key on to check for fuel leaks before mounting the UIM.

05-07-2012, 06:19 PM
nice..will do

05-07-2012, 06:36 PM
quoted me, and I don't even get credit? lol