Air box

[Optimaldave]

I am fairly fimilar with what my '88 had, but that vacuum routing seems awfully fishy..

Like the carbon canister ran to a vacuum nipple under the throttle body. And the ""B" goes to the other side.." went to E. But what goes to B? The MAP line you have might be FPR. Does you have an auto or manual? Cruise, etc?

Only way to "fix" it is to positively identify what is what, and cap off any additional taps. A vacuum tap is a vacuum tap, not sure why you have a vacuum line on one side of the plenum going to the other, it's the same vacuum source..

It is a 5speed, with cruise control, power nothing, had A/C but it has been removed...
I agree that one of the two "B"s should be run to "E"
I have seen from other threads on this forum that it would appear the "B" on the passenger side of the plennum goes to "E" on the airbox.
but it then makes me wonder what should be drawing from the now open "B" nipple...
Granted when I pull the airbox there won't be anything to draw from so I just have to worry about if the other lines are correct

Cheers

 

[pcollins]

(I live in CA, are we the only state?).

nope. we have emissions testing in NY to. and its harder to keep the car healthy with all this damn rust. and our vehicles here can also fail due to excessive frame rot :/

 

[coulrophobian]

If my photographic memory serves me correctly, "other end of 'B'" should connect to "E". I agree with psychopete, something fishy with the "B" line. Definitely not correct. I think the Driver side of "B" is supposed to be sealed off. Also, like Psychopete asked, is it a manual?

 

[Psychopete]

Granted when I pull the airbox there won't be anything to draw from so I just have to worry about if the other lines are correct

Yes, only connect what you need, cap off the rest. Vacuum caps are cheap at the auto parts store, they usually will keep them on shelf with/around the 'help' stuff.

I removed the whole passenger side tap when I converted to MAF with a plug since I didn't use the stock intake and the vacuum source to the MAP sensor could be disconnected. I only had auto trans, brake booster, FPR, PCV system, and vapor canister if I remember right. No A/C or cruise from the factory - Really cleaned/simplified things up though.

 

[Optimaldave]

If my photographic memory serves me correctly, "other end of 'B'" should connect to "E". I agree with psychopete, something fishy with the "B" line. Definitely not correct. I think the Driver side of "B" is supposed to be sealed off. Also, like Psychopete asked, is it a manual?

It is a manual (Mitsub M5OD I do believe)

Yes, only connect what you need, cap off the rest. Vacuum caps are cheap at the auto parts store, they usually will keep them on shelf with/around the 'help' stuff.

I removed the whole passenger side tap when I converted to MAF with a plug since I didn't use the stock intake and the vacuum source to the MAP sensor could be disconnected. I only had auto trans, brake booster, FPR, PCV system, and vapor canister if I remember right. No A/C or cruise from the factory - Really cleaned/simplified things up though.

Having pulled the intake this weekend to swap for a 92 civic 2 3/4" cold air intake(and yes, I realize it is hot air from the engine bay in this case) I figure my best bet is to plug the two "B"s as they are useless. I work as a tech in a motorsports shop so vacuum plugs are plentiful. Everything else I will likely leave as is.

any other input is appreciated though

Cheers

 

[coulrophobian]

ok, So I went took a look this morning and could not find where the line from the airbox was supposed to go. So I took pictures and was hoping someone could take a look and tell me if the lines are running to the correct places or if it is all FUBAR.... This truck has had a history of bad repairs from what I can tell so I wouldn't be surprised if someone messed with the routing of the lines...

So my main question is where on the engine "E" should go seeing as if everything else is right then I have a leak from where "E" connects to the plennum...

Cheers

I was remembered to look at mine today and found that the driver's side of "B" goes to the cylindrical "thing" with the rounded tip that is just under the red wire in the middle picture. "B" doesn't go directly to the "thing," but it connects to a 3-way "fork" of vacuum lines that comes off of the "thing." In short, DRIVER'S SIDE "B" goes back and around to the rear through where your red wire is, then to the "fork" of vacuum lines that is connected to the "thing"... on my truck ha ha. So... what is this "thing?" Sorry for the terrible description.

 

[Optimaldave]

I was remembered to look at mine today and found that the driver's side of "B" goes to the cylindrical "thing" with the rounded tip that is just under the red wire in the middle picture. "B" doesn't go directly to the "thing," but it connects to a 3-way "fork" of vacuum lines that comes off of the "thing." In short, DRIVER'S SIDE "B" goes back and around to the rear through where your red wire is, then to the "fork" of vacuum lines that is connected to the "thing"... on my truck ha ha. So... what is this "thing?" Sorry for the terrible description.

My "A" is what connects to the fork by the "thing" (carbon can)
you can kinda see it in the middle picture to the front left of the carbon can.

In the middle picture, the continuation of "A" is the black line that cuts across infront of my amp power wire(the red wire) right at the top of the picture.

So I still figure I'll just plug both "B"s?

Also does anyone know if I should plug engine side of the "hot start pipe"(the pipe from the exhaust area to the intake scoop)
I noticed no exhaust gas coming out so I have left it but was wondering if anyone knows more about it?

Sorry for the poor explaination but motorcycles don't have anything like it so I don't know much about it and I really can't see in the hole.

Cheers

 

[coulrophobian]

Thanks for the "thing" clarification ha ha. I have the exhaust manifold shroud sitting there as is, tubeless and plugless. I keep the shroud on there for when I have to get it smogged. It saves time. All it is, basically, is a "heat shield" that captures heat and sends it to the "air scoop." Nothing special, nothing inside. Otherwise I don't see any reason for taking it off, or plugging it.

 

[Optimaldave]

Thanks for the "thing" clarification ha ha. I have the exhaust manifold shroud sitting there as is, tubeless and plugless. I keep the shroud on there for when I have to get it smogged. It saves time. All it is, basically, is a "heat shield" that captures heat and sends it to the "air scoop." Nothing special, nothing inside. Otherwise I don't see any reason for taking it off, or plugging it.

Yeah, I had figured it was just a shroud as it would be stupid for Ford to make basically an exhaust leak that close to the valves haha.

So I plugged the two "B"'s and everything else seems to be as it should (I hope) and I am happy with my new intake so thank you all for your help.
And sorry to ranger_noob for hijacking your thread but I hope the answers for me have helped you with your question too.

Cheers