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Old 08-14-2010, 11:22 PM   #1
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What is this thing on my fuel pressure regulator?

It is hollow. It's attached to a nipple on my regulator on one end, and nothing on the other. Looks kinda like it should snap in somewhere though.





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Old 08-15-2010, 06:35 AM   #2
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It's a vacuum hose. With it disconnected like that, it should idle like crap.
The other end should not be hard to find (shouldn't have gone far), unless some goober decided to rip it out and cap the other end.
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Old 08-15-2010, 06:58 AM   #3
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That's not a regulator. The regulator for the GTO is in the fuel tank. That item is a pulse dampener that is like a shock absorber for the fuel rails.
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Old 08-15-2010, 08:14 AM   #4
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Quote:
Originally Posted by mistermike...View Post
That's not a regulator. The regulator for the GTO is in the fuel tank. That item is a pulse dampener that is like a shock absorber for the fuel rails.

I believe he is asking for the vette in his sig.
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Old 08-15-2010, 08:34 AM   #5
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I think all LS motors are the same. Fuel pressure regulator in or at fuel pump, pulse dampener on fuel rail. The pulse dampener looks like an old fuel pressure regulator so it's confusing. An old fuel pressure regulator does both.
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Old 08-15-2010, 08:38 AM   #6
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OK. fine. Vette.

check

It's still not a regulator.
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Old 08-15-2010, 09:34 AM   #7
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Yes if it was a regulator wouldn't you have to replace it when you switch to aftermarket fuel rails?
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Old 08-15-2010, 10:04 AM   #8
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It's a 98 vette with an ls1,so if it's like the early ls1 f-bodies it is a fuel pressure regulator.98-2000 used a return setup and had a pressure regulator at the rail.
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Old 08-15-2010, 11:21 AM   #9
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Quote:
Originally Posted by george g...View Post
It's a 98 vette with an ls1,so if it's like the early ls1 f-bodies it is a fuel pressure regulator.98-2000 used a return setup and had a pressure regulator at the rail.

Yes it's a '98 and I can see the return plumbing. It didn't look like there was anyplace on that to plug this in.

Anyway it doesn't idle like crap and this hose doesn't smell like gas or anything.

FWIW the car has an LS6 intake manifold. I wonder if maybe there was some place on hte old LS1 manifold to attach this thing?
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Old 08-15-2010, 11:25 AM   #10
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I would check over on ls1tech,since alot of people over there have changed from an ls1 to ls6 intake and tell you where they hook theirs too.
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Old 08-15-2010, 12:18 PM   #11
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I've been looking for pictures of early Corvette LS1s, but these people never remove their FRCs...
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Old 08-15-2010, 01:07 PM   #12
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I found this:
http://www.ls1gto.com/forums/showthread.php?p=5994393
(oddly enough on this site, and not LS1tech)

but I still can't see exactly where it's going. I don't have any place on the back side of the tb or front part of the manifold where it would go.
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Old 08-15-2010, 02:57 PM   #13
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Check this out, maybe it will help
http://www.ls1truck.com/forums/front...take-swap.html

Shows a few good pictures of the vacuum lines and...
Quote:
parts for the job:

ls6 intake
97/98 vette fuel rail (for 99 to 03 trucks) or 98 to 02 f body fuel rail (04 & up)

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Old 08-15-2010, 03:55 PM   #14
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That is your fuel pressure regulator purge line that goes to your air intake duct.
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Old 08-16-2010, 09:30 AM   #15
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i would find a manifold vacuum port and put a "T" in the line and run a hose over to the pressure regulator , and call it a day

its very possible the LS1 intake had a special nipple for it near the throttle body and it was lost in the swap to the LS6

location of the line doesnt matter as long as its manifold vacuum
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Old 08-17-2010, 09:44 AM   #16
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Looks like it goes behind the TB to the pass side.

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