pinkrx7

iTrader: (2)

I was wondering how to install the secondary fuel rails. I tried for about 45 minutes to push the rail (with insulator already on the rail) into the hole. Am I supposed to insert the insulator first?

IRPerformance

iTrader: (41)

I put the insulator into the boss on the lower intake manifold, spray it with some wd40 or silicone spray and gently insert the injectors and rail. You shouldn't have to force anything.

pinkrx7

iTrader: (2)

It seems as if the insulators are too small for the rail; so I have to stretch the insulator over the rail. Otherwise I cant get it to go in.

SO

Are you saying the secondary fuel rail and injectors sit on top of the insulator?

pinkrx7

iTrader: (2)

Someone has to know.

IRPerformance

iTrader: (41)

Yes. Put the diffuser in the boss in the lower intake manifold, then install the insulator. Then the rail sits on top of that. I usually install the injectors in the actual rail first then bolt it down as an assembly.

pinkrx7

iTrader: (2)

so should i take the diffuser out and reinstall it? i never took it out. the injectors are already in the fuel rail.

jd to rescue

iTrader: (3)

You're over thinking this one. RES has explained the steps. The diffusers are in the LIM boss openings. If you have already pulled them out, then you need to make sure you have them slotted back into position correctly (that is, they go in rotated a certain direction--see FSM if necessary). The insulator is placed in the boss on top of the diffuser. You then place the secondary rail on top of the insulator and compress it down mildly as you bolt down the secondary rail. That is how you create the seal for that opening. Nothing should be stressed if everything is installed correctly.

badddrx7

iTrader: (7)

Check to make sure those diffusers ( air bleed sockets ) are inserted properly and "hit home". They have an "indexing" mark on top of them that fits in a slot in the iron. They might look like they are in place and in fact may not be. Double check. Refer to manual page F-106 " notches"

later