SF 1HOTLS1

iTrader: (24)

ok folks, I have a fast lsxr (not the truck one) 102 manifold with ls1 style injectors (siemens 60lb).

I bought the Fast billet rails #FST-146032-KIT. Driver side seals perfect! Passenger side is a bit lose and leaks fuel from the upper o ring area. before opening the key to the on position, i can literally pull the injector up and down. then when i open the key to let fuel in, the pressure pushes the injector down and i can visibly see the o ring pushed out of the fuel rail causing my leak.

how do i fix this? i already put new o rings and it didnt help.

SF 1HOTLS1

iTrader: (24)

anybody?

c-bolt

iTrader: (1)

It sounds like it isnt seated all the way. Is there any obstruction keeping it from bottoming out? How bout the rails? Is there any visible difference between the rails and the mounts? I would hold them up side by side and take a good long look. Then, swap them side to side and see if there is play. If the loose side follows the rail, then It sounds like a mount problem. If it stays, it could be the manifold.

Do you have any pics?

Ryans99ls1

iTrader: (16)

On my car, the passenger side was fine but the driver side was really bad. I bought oversized orings for the top of the injectors which helped but i still ended up with a huge leak on #8. I ended up making my own L-brackets that really pull down on the rear of the rail. No problems since, and i check it a lot..

The problem is that the front bracket is really close to the end of the rail so it has no problem holding them down. The rear bracket is about 2 injectors before the end of the rail and the last one has almost no pressure applied to it. It took some trial and error to get my brackets right but they work. They say that rails should be installed in their "natural" position but i made the brackets so it pulls the rail just barelyyy forward and down, seemed to do the trick. It all just seemed too loose in its resting position

Old Geezer

iTrader: (3)

Check the bend angles and the hole locations on all 4 brackets..

SF 1HOTLS1

iTrader: (24)

Ya it seems the brakets supplied are not pushing the rail down all the way. I will try swapping the driver side to the passenger side to see what happens. I will of course examine the rails n brackets to ensure everything is equal

SF 1HOTLS1

iTrader: (24)

Ya i think the brackets are the issue here. What o rings did you use? Ive tried the ls1 and ls2 with no luck.

camaroboy869592

iTrader: (42)

i had two sets do that sold them bought speed inc high flow rails no problems and fit better

SF 1HOTLS1

iTrader: (24)

The fast 102 rails? Fuuck. It sucks because my fast 92 rails were a solid piece. But these 102 rails r a headache

SF 1HOTLS1

iTrader: (24)

Ok so it ended up being the brackets. They were NOT designed very well. I had to open up the hole that bolts the bracket to the rail. By opening up the hole i was able to push down on the rail so that i can get a tight seal.

I will call fast to complain. Someone could lose there car to a fire over this! Luckily i keep an extinguisher with me at all times. I will post pics of what i did to the bracket later.

PlatnumStatuz

iTrader: (6)

I got the same problem, except on left side. fast techline is acting like they've never heard of such a thing

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SF 1HOTLS1

iTrader: (24)

Ya thats what mine was doing. I fixed the issue, and got a tight seal but im still not comfortable knowing it can.possibly happen again. I should have bought an ls2 rail smh. Lol

PlatnumStatuz

iTrader: (6)

ya it sucks I cut and welded the rail brackets on another set I had guess I'll do the same with these

00pooterSS

iTrader: (40)

I was having the same problem, you need to use the fat o-ring that came with the intake on the BOTTOM of the injector or they will not seat/seal

https://ls1tech.com/forums/texas-mem...l#post17978602