lopedl

iTrader: (1)

Hi I need someone to help me identify the parts off the intake manifold and their function, so that I may get a better understanding of what they are and their function. I was hoping this could answer a couple of questions I had, and perhaps be utilized in the future by other members.



I'll start:
Ryneberg stated that part A:

is the throttle position sensor

Part B:

actuator (double throttle control)

Part E:
catch tank:

Part D:

Seems to be connected to the coolant system



Also does the map sensor plug onto the nipple shown between A and C, I believe so but was also hoping someone could verify that too.

Next I need to get some clarification about the pipe on the vacuuming that does not get connected. Can anyone verify if that would be the second to the back third pipe down. As you can see in the picture its the one unplugged with a little yellow line on it, both sides are unplugged right? .




Thanks for all your help it's greatly appreciated.

SBi_Owner

As far as part C...... I think it is the ISC solenoid valve. Its plug has a lavender with green stripe wire and a black with wite stripe wire.

As far as the rats nest, you need the diagram man.

Mikey

this site should help you with most of your questions:

http://www.rx7turboturbo.com/robrobi..._to_engine.htm

A)
http://www.rx7turboturbo.com/robrobinette/tps_adj.htm

B)
http://www.rx7turboturbo.com/robrobi...e_throttle.htm

D)
http://www.rx7turboturbo.com/robrobi...dy_coolant.htm

maxcooper

C: I concur, it is the Idle Speed Control (ISC) solenoid. It maintains your idle speed by letting air around the throttle plates, I think mainly for when there is a high electrical load (lights, AC, etc.) on the engine, but perhaps also just for controlling idle speed under all conditions (not sure).

D: I think that is the thing with the wax in it that keeps your idle high on cold starts - until the wax melts. I'm not sure if that is right, though.

F: Accelerated Warm-up System (AWS) hose. Keeps your idle even higher on cold starts by allowing air to bypass the throttle plates.

-Max

lopedl

iTrader: (1)

Thanks guys for all the info. Mikey the links helped out big time, 4 out of the 6 parts needing info. And after all the searching I realized I have the catch tank E positioned in the opposite direction woops!!!

lopedl

iTrader: (1)

So

Part B: controlls the butterflies inside the manifold.

Part D: isn't really a necessary part unless living in colder climates, and like Max Cooper mentioned might have some wax in it or something "Rob Robinette Adds" This mod will remove the hot engine coolant flowing around the throttle body. The coolant is there to keep ice from forming around the throttle butterflies but unless you live in Canada you probably don't need it. With this mod the engine will start fine, but it will idle a little lumpy until the engine warms up. I've never had my car stall even when starting it at temperatures below freezing. This mod will also simplify the coolant system flow.

E: What does the catch tank do?

Mikey

yes...B controlls the butterflies
get rid of part D...it is just dumb
and for E)

i pulled this from http://www.tpub.com/content/construc.../14264_154.htm

The fuel evaporization control system prevents vapors from the fuel tank and carburetor from entering the atmosphere (fig. 4-54). Older, pre-emission vehicles used vented fuel tank caps. Carburetor bowls were also vented to the atmosphere. This caused a considerable amount of emissions. Modern vehicles commonly use fuel evaporization control systems to prevent this source of pollution. The major components of the fuel evapotization control systems are the sealed fuel tank cap, fuel air dome, liquid-vapor separator, roll- over valve, fuel tank vent line, charcoal canister, carburetor vent line, and the purge line.

soooooooo....get rid of it if you don't want it. i removed mine from the rx7 years ago and for my new supra engine i did the same. the part you have in your picture is the charcoal canister. as the name would imply, it is full of charcoal. so be careful when removing it...it'll make a mess if you turn it on it's side and let the beeds of charcoal fall out. the canister itself is located towards the rear of the car if you want to remove it.

SBi_Owner

Actually, the can (part E) is one of the most common problems with the engine not passing emissions testing. You want to pull it off and lightly blow it dry the day of emissions testing. It can shoot the HC's through the roof. Trust me, I know from experience.

Mikey

oops...yah, i forgot to say it was for emissions. i forget that most states have emission testing...we don't :-D