Intake manifold parts ID, S5 NA

[sv51macross]

Disassembling my intake manifold to replace leaky components in the area of the primary fuel rail. I stopped after removing the UIM/intake tract as my light was waning and we had to go to dinner. I was wondering though;

-What is the electronic component the coolant passes through right next to the secondary fuel rail?
-Why is the coolant routed up to the throttle body? AWS?

And while I'm at it, wasn't able to procure PFA tubing to replace the oil injection lines, will small-engine fuel line work?

[RETed]

Originally Posted by sv51macross

-What is the electronic component the coolant passes through right next to the secondary fuel rail?

Non-turbo, right?
Most likely the ACV cluster - it's for emissions.

-Why is the coolant routed up to the throttle body? AWS?

Yes, it's the cold start system.
Through the use of a wax pellet (that melts), it bumps up idle speed by propping the throttle plates more open than normal at idle.


-Ted

[Rotary Related]

Originally Posted by sv51macross

Disassembling my intake manifold to replace leaky components in the area of the primary fuel rail. I stopped after removing the UIM/intake tract as my light was waning and we had to go to dinner. I was wondering though;

-What is the electronic component the coolant passes through right next to the secondary fuel rail?
-Why is the coolant routed up to the throttle body? AWS?

And while I'm at it, wasn't able to procure PFA tubing to replace the oil injection lines, will small-engine fuel line work?

The BAC (Idle control valve) it doesn't need coolant to work properly. It's only beneficial in cold climates. I don't use it on my own FC and it gets down to 8 degrees in TX a couple days a year.

The coolant to the throttle body is not the AWS its for the choke plates a helps warm the car up. You can remove that stuff too. But you will have to tap the holes left by removing the choke plate shaft with a 1/8" npt tap and put plugs in it. The thermowax valve thing on the side of the throttle body go away at the same time as well. The AWS is the wierd little valve near the IAT just under the edge of the upper mamnifold. Also near the PCV valve. AWS has the huge hoses on it. This could also be disabled but the valve must remain plugged in or the check engine light will turn on.

Somewhere online there's a parts list for the OMP lines you buy all the stuff at McMaster Carr and it cost like $50 for all of it. I don't have a list myself just search around you'll find it.

[sv51macross]

The first power-related mod that Lucy sees is going to be a Rtek7 2.0, which has a AWS-negator option according to the site. I figure that, eventually she's getting a NA 4-port semi-PP, so pretty much all the vac spiders, along with the factory TB will be gone.

As for the OMP lines...they're intact, and still have some give in them. And as much a pain in the hiney as the vac spiders are being...I'm leaving well enough alone. Just the injectors and pulse damper. Besides...as many vac lines as I'm going to need to replace, I'll need probably at least 1/4 of the fuel line tube I bought.