Urgent...Secondaries not opening???

[93redATX]

Now my car is running smooth, except for one little thing-the secondaries are not opening. As far as I know, the secondaries are vacuum controlled, correct? When I put the intake back on, I am positive that I didn't miss any vacuum lines. I double checked and triple checked the secondary vacuum lines, and the ones going to and from the vacuum solenoid on the back of the intake. Any ideas? I am stumped...

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-Andy

'93 Red/Black ATX
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"Nemesis"
"The Daily Driver"
-Coneless
-Red interior lights
-Fog light mod
-Pioneer DEH-1100 45x4 MOSFET Head Unit
-SHO lettering painted black
-SHO banner on windshield, SHOforum.com sticker on back window, bottom center
-Gen IV Taurus emblem on trunk

Just Added:
'89 Light Titanium/Grey MTX
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"Aphrodite"
"The Project Car"
-K&N Panel Filter
-Poor Man's Ram Air
-Boxless

My Website: http://taurusshosite.8m.com/main.html

AIM:Juggalo53048

 

[SHOTIME]

there is an electric plug on the secondaries as well

also, my first time i caught the vaccum lines under the intake when I bolted it down

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Eric
mailto:[email protected][email protected]</A>
http://people.ne.mediaone.net/billebobob/index.html

 

[sdpatt]

Why is it you think your secondary runners are not opening? Is it that you are severly lacking power from 4,000 rpm and up? Or are you severly lacking torque below 4,000 rpm?

The secondary butterfly valves are vacuum actuated, but it is vacuum that keeps them CLOSED. They open when the vacuum from the intake mainfold is isolated and the tubing to the vacuum diaphragm actuators is vented to atmosphere by the solenoid valve. The vacuum accumulator (vacuum storage tank - looks like an overgrown black plastic film canister mounted on the back center of the rear plenum) stores enough vacuum for about two full cycles of the secondary butterflies (at least on my car).

If your problem is the first one above, then the secondary butterfly valves are not opening and there is an electrical problem with the solenoid valve not venting to atmosphere. Check the connector on the solenoid. If the connector is attached, see the paragraph below for the correct routing of the vacuum lines from the plenum to the accumulator, solenoid and the diaphragm valves.

If your problem is the second one, then the secondaries are not closing and there is a lack of vaccum to close the secondary valves. Check the vacuum lines from the plenum to the accumulator, from the accumulator to the solenoid and the solenoid to the diaphragm actuators. The line from the plenum goes to the inlet tap on the accumulator nearest the plenum. The outlet from the accumulator goes to the tap on the bottom of the solenoid valve. The outlet from the solenoid goes to the plastic wrapped line to the T that splits to each vacuum diaphragm valve.


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Scott

1991, 252K miles, glass hood, police grill, SVO shifter, Catz fogs,
K&N, 73mm MAF, Superchip, PP Y-pipe, Borla cat-back, 190 lph pump
Eibach/Tokico/polyurethane, SHO Shop front & rear strut braces,
16x7.5" Moda R1, 225/55ZR16 Bridgestone RE730, -1 deg camber x 4,
Class II hitch, Silver award at the SHOklahoma Car Show

[This message has been edited by sdpatt (edited 12-10-2001).]

[This message has been edited by sdpatt (edited 12-11-2001).]

 

[Gez89SHO]

Ther is a way to visually check if the secondaries are closing. The two secondary shafts can be seen by the actuation diaphragms (one's right above the "r" in forum in the top picture), and they should change position when the engine is on.
Look at them with engine off: the lip on the shaft should be horizontal (pointed to the side). Once turned on, they should be vertical (pointed upward).
If everything's connected according to Scott's post, and it still won't work, you can check if there is voltage at the solenoid plug - there should be with engine running.
If there is, then it's probably the solenoid. I have a spare one, let me know if you need it.

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Gezim
1989 Currant Red
coneless, painted SHO lettering
Subframe Connectors, 16x7 Team Loco 143's

gzim.freeservers.com
LSHOC member

[email protected] IM: gzimi

 

[white94sho]

If all this stuff is wrong, and not working what the **** were you doing to the car? You've had a whole bunch of problems with that car.

 

[93redATX]

OK, everything is running good finally. Thanks to all for your help and insights, it was very helpful. Anyway, the no start problem turned out to be the DIS. Fixed that, it started up but was leaking coolant, so after replacing a few gaskets I noticed it was one of the intake coolant lines that I forgot to put the hose clip on the holds it on. I think somehoe the secondaries got stuck, or maybe a tube was pinched just enough to not allow it to work because they work fine now (after I was under the hood wiggling them all around and checking each connection). So, all is good. Car runs better than ever, and is not at all sluggish like it used to be.

You've had a whole bunch of problems with that car.

Tell me about it...and it wasn't so much what I did, but what I didn't do. I have neglected maintenance since I bought it a year ago because I never had the money. No more of that though.

[This message has been edited by 93redATX (edited 12-12-2001).]