Hose connections for secondaries

[Marccus]

1989 w/428,000 mi

I've done a search, but I'm trying to determine exactly where the hoses connect for the cannister and the solenoid.

The cannister is positioned with the prongs pointed upward.

There are two white dots on my cannister, not two different colors.

Please correct the following wrong:

The smallest hose from the intake reservoir connects to the top dot on the cannnister.

The intermediate size hose connects to the ????

The long hose froom the Y-connector for the secondaries connects to the ???

The solenoid has two male hose connections.
The one on top has a little white plastic "star" shaped piece in it.
The one on the bottom is a normal male hose connection.

Thanks.

 

[93rev2sev]

Congrats on your milage. If I had a picture of the secondary lines, I'd post it up...I'm sure someone can.

too bad you have a 5 digit ODO. I'd be taking a picture of the milage and putting it in my sig.

 

[sdpatt]

I did a search too. When looking for "secondary hose routing" I found several references to a former post of mine that has been archived or removed. The last search return gave the following reprint of the information. Please note the orientation of the accumulator tank "prongs." I hope this helps.

Verify that the vacuum actuators for the intake manifold secondary runner butterfly valves are closing when you start the engine. These valves are closed by vacuum and opened when the electrical solenoid releases the vacuum to atmosphere. Verify the electrical connector is attached to the solenoid on the center of the rear intake plenum (disconnected, this would keep the secondaries open all the time). Also verify the vacuum hose routing to the secondary actuators. Here is the description from an earlier post:

"The routing of the secondary butterfly vacuum lines is from the center tap on the intake's rear plenum to the front (forward) tap of the black plastic accumulator tank [NOTE: the two "prongs on the accumulator tank should be oriented forward, towards the manifold, to properly engage the manifold mounting bracket]. From the rear tap of the accumulator to the bottom tap of the solenoid. From the top tap on the solenoid to the "T" fitting under the idle air control valve. From the side post of the "T" to the rear bank secondary vacuum diaphragm valve and from the front post on the "T" to the front bank diaphragm valve."

 

[itwonder]

This should show you what you need to know. Notice that one dot on the cannister is brilliant white and has the letter A embossed next to the port. It can also be identified by tiny lettering etched into the side of the can near the port. This port goes to the solenoid valve, bottom port. The other dot is yellow-ish, and has the letter B next to it. That goes to the intake manifold port.









Keywords to aid future searches looking for this information: IMRC secondary secondaries vacuum cannister Intake manifold runner control

 

[hawkeye18]

Holy shit... 428,000 miles!?

congrats! I'm amazed the secondaries are your biggest concern...

 

[Marccus]

Wow.

Thanks very much for that info that details everything so clearly

:thankyou:

 

[westcoastclarke]

If the inside of my intake ports have oil in them like that, should I be concerned?

 

[itwonder]

If the inside of my intake ports have oil in them like that, should I be concerned?

It's residue from the PCV system that builds up over time. The intake in the photos is due for a cleaning.

 

[westcoastclarke]

I just changed my water pump for the first time this weekend. Thats when i noticed the residue. Theres no oil in the plug wells but how concerned should I be about getting it cleaned? Should I look to change a pcv?

 

[hawkeye18]

The SHO intake always has gunk in it. It's a design flaw of the PCV system, and partially a result of the rough casting on the inside of the intake.

It's not indicative of anything malfunctioning... but dirt is dirt, and you should by all means clean it out if you feel so inclined (easy-off oven cleaner works great for this, but be careful with it; it'll strip the paint right off the outside).