I have a tpi with a fuel rail schrader valve that leaks. It started when I started adjusting my fuel pressure and using a fuel pressure guage. When I took it off I noticed that I still have a little fuel leak from the valve. But I cant find a new valve or stem. Called GM and its discontinued. Any tips?

Put the cap back on it.

Has the core just come loose?

I dont know if its loose. Can I just use any valve stem tool to tighten it?

And I lost that black cap when I was using the fp guage. I couldnt find it anywhere and no one has anything that fits.

u might have to replace the fuel rail.

why replace the whole rail?

i cant believe it. Ive looked about everywhere for this piece and no one has carried it. And then i just happen to look at one thirdgen.org's sponsor sites and lo and behold:

I may have a spare valve. But why not just plug the hole?

I just bought some stems and a removal tool. I may just replace the stem as I think that is the problem.

I thought about plugging the hole for the time being, but I think the threads on the schrader valves are -AN sizes, arent they? So a quick trip to home depot for a plug of the same size would be out of the question.

Uggg I hate fuel problems. They make me really nervous. I have a leaky schrader valve along with a holley AFPR that wont give me any more than 40 psi.

I don't think home depot sells AN fittings, but it doesn't matter since they're pipe thread sizes. And it really doesn't matter since you found the right piece!

Yeah...no doubt. But I went ahead and bought some valve stems and a valve stem tool. The stem was about three turns loose. I tightened it down and dont see any more fuel coming from the valve. I think I got it. Must have loosened when I screwed the fp guage on and off it.

Ok sorry, was thinking the leak was coming from near the shradder valve not the shradder valve, damn i need stronger coffee at work.. Oh an yah working on the fuel system is kinda nerve racking, i just make sure i have someone standing by with a fire extinguisher.

why not just buy the new part that you found from AC delco to make sure you have a good part in there and not one that leaks?...seeing that you just happen to find it.........I happen to find that many hard to find parts are made by A/C Delco...like the V-6 cold start injector that people said was discontinued by GM and everyone else

Those are the same people. GM owns AC/Delco.

But, you purchase AC/Delco parts under their brand name, through a whole different network of suppliers than "GM" dealers. In other words, you walk up to a dealer counter and it's discontinued; but you go to your corner parts store that carries AC/Delco (around here, that's CarQuest, for instance) and it's sitting on their shelf.

There are things in the world that you MUST get from the dealer (most interior or trim parts for example); things that you COULD get from the dealer but they may or may not be the best source for (again, trim parts, alot of engine parts, and so forth); things that you can get at the dealer but it's STUPID to get from there for whatever reason (like most mechanical parts, or batteries), and things that you CANNOT get at the dealer (gasoline, tires, "discontinued" parts). Part of the skill you have to develop as a hobbyist, is recognizing when a thing changes from one category to another, and in identifying those other sources.

so A/C parts are the same? so the parts are basically NOS parts that A/C Delco sells but GM made but no longer carries? Sorry to ask, just want to clear that up

I'm going to buy some new fuel injectors, A/C Delco, so woudl those basically be GM injectors made by GM but sold as A/C delcos?

It was loose, not broken, why in the world should he spend money to buy a part he doesn't need.

Oh, and AC Delco came about when General Motors Corp.'s AC Rochester and Delco Remy divisions merged and became AC Delco Systems sometime in early/mid 90's IIRC. Since they were divisions of General Motors Corp., I'd say that, yes, they are owned by GM.

Oh II, the FMS injectors are better than the mulcraps.

No, they're not NOS; they're NNS (new NEW stock).

AC/Delco is a manufacturing arm of GM. They sell their entire product line NOT ONLY to GM for use on production lines (GM dealer part numbers), but also under their own part number system and brand name, to the service industry.

GM car dealers are NEW CAR dealers. They exist to sell and service NEW cars. They don't stock any parts for any cars older than 5 years or so, unless they're legally required to. So unless your 3rd gen is less than 5 years old (not bloody likely....), expect to find that LOTS of "GM" parts for it are "discontinued" at the new car dealers; even if the GM subsidiaries that produce them, still make them available through service channels. Or for that matter, even if the same part fits some other GM cars that are sitting on their lot today. Meaning, the PART isn't what's been "discontinued", the LOOKUP INFO has. The dealer people just can't look them up any more.

Which means, all you gotta do, is find the right channel.

RD, AFAIK AC and Delco have ALWAYS been GM brands. I know for certain it's been at least since about World War 2. Rochester Products is the fuel system parts division of AC, and has been for 50 or 60 years at least. But yes, they are ALL properties of GM, whether or not you can get to their individual divisional distribution networks by entering them at the top level (GM dealers). Harrison Radiators and Packard Electric are other such divisions. Like, go to the Chevy dealer and ask for some connector like for a transmission or something, and it's "discontinued"; but go to a PED distributor, and there it is sitting on the shelf.