94 Vacuum system.
Thread Starter
|
New User
Joined: Apr 2007
Posts: 4
Likes: 0
94 Vacuum system.
Howdy!
I bought a 94 4WD Aerostar from an auction at the beginning of last month. I had to replace the front CV joins (pain in the butt), but I still have another issue haunting my van. It's been happening since I bought it. The van sputters, surges and/or tries to die when it's idling. It is the worst when you have the van in gear (automatic) and the foot-brake applied (waiting for a red light to change). If you put the van into Park, it's much less noticeable (waiting for the drive-throu line at McDonald's to move). Once you start to apply the accelerator the surging goes away and the van runs great (fleeing with the extra BigMac they gave you by mistake). I've tried injector cleaner, gas treatment additives and nothing has fixed this problem. Then about two weeks ago I noticed a pop, hiss then very little brakes. The vacuum hose for the brake booster popped off. When I went to put it back on I noticed that the vacuum hose for the Cruse Control wasn't plugged in either. However there was only one free **** to put a hose onto. I weighed in my head that brakes are more important then being able to cruse, so the cruse-control is still disconnected. That got me to thinking that the surging issue maybe vacuum related, but I have not been able to find a diagram or another vehicle that I can look at to see where all the vacuum hoses go.
Can someone please link or post a diagram of the vacuum hose system for the 94 4wd Aerostar?
media.
I bought a 94 4WD Aerostar from an auction at the beginning of last month. I had to replace the front CV joins (pain in the butt), but I still have another issue haunting my van. It's been happening since I bought it. The van sputters, surges and/or tries to die when it's idling. It is the worst when you have the van in gear (automatic) and the foot-brake applied (waiting for a red light to change). If you put the van into Park, it's much less noticeable (waiting for the drive-throu line at McDonald's to move). Once you start to apply the accelerator the surging goes away and the van runs great (fleeing with the extra BigMac they gave you by mistake). I've tried injector cleaner, gas treatment additives and nothing has fixed this problem. Then about two weeks ago I noticed a pop, hiss then very little brakes. The vacuum hose for the brake booster popped off. When I went to put it back on I noticed that the vacuum hose for the Cruse Control wasn't plugged in either. However there was only one free **** to put a hose onto. I weighed in my head that brakes are more important then being able to cruse, so the cruse-control is still disconnected. That got me to thinking that the surging issue maybe vacuum related, but I have not been able to find a diagram or another vehicle that I can look at to see where all the vacuum hoses go.
Can someone please link or post a diagram of the vacuum hose system for the 94 4wd Aerostar?
media.
Thread Starter
|
New User
Joined: Apr 2007
Posts: 4
Likes: 0
Hermmm, I am thinking it's the 3.0 if I remember correctly. I'll have a look tonight to make sure.
media.
/edit/
I had a look at the diagram you posted. (please forgive the novice questions, I am not a mechanic). I didn't see any mention of the vac-hoses for the cruse-control or brake booster. Is there a diagram that shows where those go, if they are supposed to have their own nipple to connect to the main cylinder and if they are supposed to be branched off the two nipples that are availible (that I can see) via a "T" or "Y" connector? (there is a thrid vac-hose that is connected to a second nipple, but I am not sure what it's connected to).
media
media.
/edit/
I had a look at the diagram you posted. (please forgive the novice questions, I am not a mechanic). I didn't see any mention of the vac-hoses for the cruse-control or brake booster. Is there a diagram that shows where those go, if they are supposed to have their own nipple to connect to the main cylinder and if they are supposed to be branched off the two nipples that are availible (that I can see) via a "T" or "Y" connector? (there is a thrid vac-hose that is connected to a second nipple, but I am not sure what it's connected to).
media
Last edited by media; Apr 9, 2007 at 04:21 PM.
Thread Starter
|
New User
Joined: Apr 2007
Posts: 4
Likes: 0
Originally Posted by merlynr
I thought all extended 4wd were 4.0 or am I making this up?
media.
Originally Posted by copper_90680
Hi Media:
Welcome to our FTE forum
Merlynr:
There is a very small number of 3.0L AWD, almost zero. So you are right, if it an AWD, it's most likely a 4.0L.
Welcome to our FTE forum
Merlynr:
There is a very small number of 3.0L AWD, almost zero. So you are right, if it an AWD, it's most likely a 4.0L.
media.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
what's the VIN X marks the 4L spot
look on underside of hood and top of sheet metal in front of radiator by hood latch for vacuum diagram
look on underside of hood and top of sheet metal in front of radiator by hood latch for vacuum diagram
Trending Topics
Posting Guru
Joined: Aug 2005
Posts: 1,069
Likes: 1
I went and looked at my son's 4.0 awd(lives next door) and there are 2 vac lines going to the cruise control. One comes from somewhere at rear of eng. and the other one seems to come thru the firewall near the brake booster. the one from the brake booster swoops down and goes back up to rear of engine also. didn't take the doghouse off (pia).
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
New User
Joined: Apr 2007
Posts: 4
Likes: 0
It's a 4.0L engine, the sticker on the underside of the hood said so. I also saw the vacuum diagram however it only shows the brakebooster vac-line coming from the back of the engine. The cruise control wasn't shown anywhere on the diagram.
So I still have a cruise control vac line with no home.
media.
So I still have a cruise control vac line with no home.
media.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
cruise aka speed control vac. line is black/brown goes to vac. distribution block on back of manifold...access thru dog hatch inside...rib buster and knuckle skin remover...take off RABS controller on bottom of dash center
brake booster, heater vac cont., tranny vac. mod. also run to same dist. block
brake booster, heater vac cont., tranny vac. mod. also run to same dist. block
