Where do these lines go?

[tmorgan4]

I need a little bit of help from the VH experts on here so I can finish plumbing my engine. I've got a good amount of it together but there's some lines that I'm not 100% sure where they go. I'm going to leave the pictures full res. so they're easier to see.



Red - small nipple coming off fuel damper....see later pictureYellow and Blue are fuel lines...which goes where?



Yellow circles...fuel lines. Probably connect with yellow and blue lines above?Green - Nipple coming off heater core tube that goes to "Intake Collector." Does Green go to Blue?Red - Connects to IAC valve. Where does the bottom of this Y-pipe go?



Do these small nipples from the fuel damper and regular connect? Equalizer? (Same as circled in Red in first picture)



Red - No idea...PCV? Green - ????Blue - ?????

Getting closer! Hope to have it running next weekend if I can get this figured out.

[elwesso]

What you need is the fuel system diagram.

[img]http://is.rely.net/3-12-3108-l-9syVMEIq ... 0A.jpg/img]

Study that and see if that doesnt help you, that should have all the fuel hoses. So that should answer the yellow circles.

The red circle... there should be a metal tube to nowhere that goes under the plenum. If its not there, take off that goofy 3 holed hose and just connect from the IAC to the metal pipe.

For the 3rd picture, those are actually vacuum lines, you do NOT want to connect the 2 because that wouldnt do anything. There is a small vacuum port off the back side of the plenum, sorta by the EGR. There should also be a place you could put a small vacuum line on that metal pipe that goes along the back (where the IAC ends up connecting to via the Y shaped hose)

Connect the bottom fuel pressure thing to the fitting near the hose where the Y shaped IAC hose is (i can see the port from the picture). Likewise, theres another one for the top one close by. Basically, the way it works is that is like one single line, you hook the far end to the plenum, then the top fuel regulator, then the bottom fuel regulator. Let me know if I need to be more clear because it seems clear as mud to me and I know what im talking about..

Last picture-

the red one goes to the middle port on the valve cover. The green one hooks into the factory black intake tube on the top (there should be a metal fitting coming out of the end). The yellow one is a turn down which goes under the plenum via a metal pipe to get vacuum for the passenger side valve cover PCV

[tmorgan4]

HOly lots of infomation! Thank you Wes.

Maybe having it running this weekend just might possibly happen.

[qsiguy]

Here's a bit more info...

Pic #2 blue circle is the brake power booster source. I used this for my boost gauge reference as well. This goes out via 3/8" tubing to a check valve then to the brake booster.

Pic #4 See my pic for reference. Green goes to the metal section after the black rubber intake hose, this maybe be different w/o TCS. This line is under vacuum and draws in air to the crankcase to mix with vapors then out of crankcase through PCV into plenum. Currently mine is just drawing in ambient air since I had to keep from pressurizing my crankcase but if you are staying NA just connect it after the MAF somewhere so the air going in is metered.

The blue one does connect to the bottom of the black OEM rubber intake tube and should be connected in about the same area where you connect the other one. Just needs metered air after the MAF.

[tmorgan4]

Very good info! I will have to look since like you mentioned, my engine is a non-TCS model. Thanks again.

[elwesso]

If you just want to look at a MILLION pics, here you go

zerothread?id=212964

[T45]

pic 1- blue goes to the pass side fuel rail. red goes to the intake manifold, there is a port on the back of the intake. I am thinking that the yellow goes to the drivers side fuel rail but can't tell where it's coming from in the pic. If it comes off the dual fuel likes that run up under the plenum and exit on the pass side then it goes to the drivers side fuel rail.

pic 2 - blue should be to the brake booster, at least that's what mine is going to go to. Yellow on right goes to fuel damper just below it to the line dangling. red should go to the egr tube off the exhaust mani. green is a coolant line that runs up to the throttle body, snakes around a few times and then goes to another port on one of the coolant housings under the intake mani. It isn't necessary unless you live in a cold climate, your throttle body can freeze up and make you go fastest over cliffs.

pic 3 shows the vacuum ports that go to the throttle body. If I recall correctly, the damper gets vacuum constantly, there is a port on the back of the intake mani for it, and the regulator gets vacuum from the throttle body. There is a good diagram in the FSM about it. I may have them memorized backwards.

pic 4- the green is for the egr and goes to the intake hose IIRC. The red does a u-turn and goes into the drivers side valve cover. The blue probably goes to the intake tube but I may be missing something.

Hope it helped a little.

Don't hold me to any of these answers as I am on quite a big losing streak.

[tmorgan4]

Thanks to everyone for the help. Almost got this thing together....might be able to start it today if I put in a long days work.

In picture 2, the green circle is labeled in the FSM as going to the intake collector. This I assume is used interchangeably with intake manifold. The ones you were referring to T45 are further up by the knock sensors that go to the TB. These have both been capped even though I live in a cold climate. I didn't feel it was necessary.

Which port should the green circle in picture 2 go to? The right angled port that points down one runner over from the brake booster? I want to make sure the coolant is going where it's supposed to!

[T45]

Ah, I didn't see that you were using that factory piping. You're talking about the vacuum line and not the water outlet. The vacuum goes to the pass fuel damper.

However if you are talking about the coolant outlet then it should go to the TB but not necessary.

[tmorgan4]

I didn't even realize there were 2 lines circled in that picture. Right now, I'm actually trying to figure out that water/coolant outlet. Not that it really matters, but isn't the one that goes to the TB the on in the picture here that is capped on the drivers side of the Y-pipe?



I need to double check in the FSM. I was thinking this outlet goes somewhere on the intake manifold.

[tmorgan4]

Found it...says it goes to "intake collector". Where would this be?

[tmorgan4]

Now that I'm looking at it again, I think I need to plug this one mentioned above. It seems that this is the other side of the throttle body coolant "circuit". Someone please correct me if I'm wrong.

[Q45tech]

That's correct those two form the TB housing heater loop.

Using the word vacuum lines instead of lower than atmospheric pressure lines causes some confusion.

The fuel pulse damper is controlled by a line attached just after the MAF where the pressure only varies from 14.7 down to 14.2 psi :

The oem air horn + filter + box has a max loss of 7' water column added to the max loss thru the MAF ~~ another 7" yields 14" or 1/2 psi differential pressure.

Just as the plenum goes from 14.0 psi at WOT to 9.4 psi at idle or cruise changing fuel pressure regulator from 43.4 psi down to 34 psi.............a 2 psi fuel pressure change for every 1.0 psi in plenum pressure change.

[maxnix]

What you need is the fuel system diagram.



Study that and see if that doesnt help you, that should have all the fuel hoses. So that should answer the yellow circles.