Vacuum Hose / AC Vent?

[turn_on68]

I was reading yesterday where someone else was having a Vacuum leak and AC was blowing thru his Def. Vent. I have a '98 Mark and went to see where mine black vent hose cover was and found it. It was hanging down in the drivers side intake manifold as far as the Vacuum hoses would reach. It ends with both Vacuum hoses going into an electrical Vacuum switch. Problem is there is no plug around where I found it that would plug into it? I am attaching some pics and maybe someone knows where this is suppose to go or can look at their 98 and tell me where it is suppose to plug in. There is a shorter one plugged in right in front to the right of the brake Master Cylinder and suppose to be held by the mounting plate on the the valve cover, but one of the nuts is missing? In the pics you can see where it says Laying down in here there is the hole in the manifold and it was laying right above that and that is as far as the hoses reach? Mine jumps to Def vent when I accelerate and then when I let off it drops back to the AC vents./B]

 

[Moes8]

is that the EGR solenoid?

 

[turn_on68]

Its on the other side from the EGR.

 

[turn_on68]

Anyone with a 98 that could send pics of their vacuum lines coming towards the front of the engine drivers side?

 

[DLF]

is that the EGR solenoid?

No, it looks like the AIR valve solenoid that should be under the Driver's side shock tower cover.

Anyone with a 98 that could send pics of their vacuum lines coming towards the front of the engine drivers side?

Here you go. The first pic is the EGR control solenoid. The second pic is the AIR valve control solenoid.

 

[Sapperfire]

 

[turn_on68]

Ok so on the second one, the air valve control solenoid , I can't find the plug that should plug into it. I don't think I'm getting CE light. Is it okay to leave it like that? This is the way I got thecar. Maybe when the former owner had the springs put on they forgot to hook that back up?

 

[GMAN]

You have to have the code checked, so we can get an adequate diagnosis. It could be unrelated.

 

[turn_on68]

GMAN I'm not getting a code.

 

[GMAN]

GMAN I'm not getting a code.

You mentioned earlier you had a CE light. Did you plug a scanner to the car?

 

[turn_on68]

Quote "I don't think I'm getting a CE light" Greg..

 

[turn_on68]

I also don't remember having any plugs or wiring under the strut tower cover on my other 98.

 

[GMAN]

All Gen 2's have them. If you follow the main harness that plugs into the brake reservoir, it splits off and plugs into the air solenoid.

 

[turn_on68]

Thanks to all who replied. I found the plug under the strut cover. There looks like a new wire coming out of the brake booster. It is all too short to reach the bracket,so I layed it downinside the strut cover. Before all this I did have AC blower. Now no air blows with any setting on the EATC BUTTONS?

 

[turn_on68]

Can you or someone else tell me what the air solenoid actually does?

 

[Icarus]

If it drops to def on accel, its probably the lil vac resevoir in the fender or hose going to it thats leaking...

 

[DLF]

Can you or someone else tell me what the air solenoid actually does?

It controls the vacuum that opens the air injection valve in front of the crank pulley.

 

[turn_on68]

So what would the effect on the engine if there was no power going to it. Wouldn't it throw a code on the CE light?

 

[turn_on68]

If it drops to def on accel, its probably the lil vac resevoir in the fender or hose going to it thats leaking...

So do I have to pull the fender, or can I get to it from the wheel opening by removing the wheel liner in there?

 

[GMAN]

If the air injection valve has a fault. It will in fact throw a CE light. There is no need to remove the fender to check the fender now, before you check other possibilities. Air not coming out of the vents can be the fan located behind the glove box. Your wire harness could be fried. I'm surprised no one mentioned it yet. This is a known problem with the air in both gens.

 

[TheBigRedOne]

So do I have to pull the fender, or can I get to it from the wheel opening by removing the wheel liner in there?

Just remove the wheel well liner.

 

[96_Lincoln_LSC]

It controls the vacuum that opens the air injection valve in front of the crank pulley.

Hey Doug,
I think I see a spec of Dirt on the A/C clutch.. you may need to dis-assemble it to really clean it out..

 

[96_Lincoln_LSC]

If the air injection valve has a fault. It will in fact throw a CE light. There is no need to remove the fender to check the fender now, before you check other possibilities. Air not coming out of the vents can be the fan located behind the glove box. Your wire harness could be fried. I'm surprised no one mentioned it yet. This is a known problem with the air in both gens.

X1000

Happened to me.. Crimp on new ends and good to go.. But I dont think the OP said anything about not having the blower motor working..

 

[turn_on68]

If the air injection valve has a fault. It will in fact throw a CE light. There is no need to remove the fender to check the fender now, before you check other possibilities. Air not coming out of the vents can be the fan located behind the glove box. Your wire harness could be fried. I'm surprised no one mentioned it yet. This is a known problem with the air in both gens.

Okay so what do I do now GMAN?
Last time I ran the car the fan worked? Should I check a fuse? If so anyone know what fuse number or numbers? Not a thing happens when I push any buttons on the AC buttons I mean it is lit and temp can be raise or lowered it shows max AC but no air blowing out in any mode. So blower has stopped working.

 

[chris2523]

check the wiring to the fan. the plug gets loose.