What Vacuum Lines Do I Actually need
Posting Guru
Joined: Nov 2011
Posts: 1,302
Likes: 5
From: Burlington, WI
If I were you, here's what I would do.
1. Check the timing. To do this, unplug the vacuum advance at the distributor, start the engine and let it idle and WARM UP TO NORMAL OPERATING TEMPS. Make sure the choke is open and that it isnt idling on high idle. The hook up your timing light and make sure the timing mark on the balancer matches the "finger" on the block. Rotate the distributor if you find the timing is off. You want to be at 12 degrees BTDC.
2. Tune the carb. Refer to my post(s) above. Be sure to remove the vacuum gauge when done.
3. If you find the truck idles at low RPMS, adjust the IDLE SPEED SCREW on the back of the throttle linkage. You want it to idle at around ~850 RPMS once fully warm and in park.
1. Check the timing. To do this, unplug the vacuum advance at the distributor, start the engine and let it idle and WARM UP TO NORMAL OPERATING TEMPS. Make sure the choke is open and that it isnt idling on high idle. The hook up your timing light and make sure the timing mark on the balancer matches the "finger" on the block. Rotate the distributor if you find the timing is off. You want to be at 12 degrees BTDC.
2. Tune the carb. Refer to my post(s) above. Be sure to remove the vacuum gauge when done.
3. If you find the truck idles at low RPMS, adjust the IDLE SPEED SCREW on the back of the throttle linkage. You want it to idle at around ~850 RPMS once fully warm and in park.
Posting Guru
Joined: Nov 2011
Posts: 1,302
Likes: 5
From: Burlington, WI
HOLY CRAP STUPID ME.....yeah I know what that is I just call it the filter not cleaner and thought maybe you were talking about something else. I do not currently have a vacuum from the manifold to the damper on the air cleaner. Do I need this and it should always be under vacuum from the manifold?
Posting Guru
Joined: Nov 2011
Posts: 1,302
Likes: 5
From: Burlington, WI
Correct that is the EGR. It stands for "exhaust gas recirculation". It basically is for emissions as its job is to take some of the exhaust gas and pump it back through the engine. Is it NEEDED? Well, no. You CAN remove it, but you MAY have to retune your carb.
Thread Starter
|
New User
Joined: Jan 2014
Posts: 19
Likes: 0
Holy buckets lotta questions at one time. No problem lemme see if I get get a feel for what youre asking here. Ok...
1. You'll know if your vacuum advance is working at high speeds/RPMS because if it isn't, then your truck will bog and run crappy. Dont worry about this right now.
2. "Kick it down"...what does that mean? I assume accelerate? Or are you referring to "kicking down" the choke at idle? If you ACCELERATE and it runs like crap, many things can cause that. If you open the choke (blip the throttle to drop from high idle to normal idle) and it runs like crap, sounds like a carb adjustment.
3. The inline gauge on the manifold if really only needed for tuning the carb. You dont need it for anything else.
4. At 2500 RPM, you should essentially have little to no vacuum because the throttle blades on the carb are open and air is getting into the engine (Vacuum is the ABSENCE of air...confusing I know
)
1. You'll know if your vacuum advance is working at high speeds/RPMS because if it isn't, then your truck will bog and run crappy. Dont worry about this right now.
2. "Kick it down"...what does that mean? I assume accelerate? Or are you referring to "kicking down" the choke at idle? If you ACCELERATE and it runs like crap, many things can cause that. If you open the choke (blip the throttle to drop from high idle to normal idle) and it runs like crap, sounds like a carb adjustment.
3. The inline gauge on the manifold if really only needed for tuning the carb. You dont need it for anything else.
4. At 2500 RPM, you should essentially have little to no vacuum because the throttle blades on the carb are open and air is getting into the engine (Vacuum is the ABSENCE of air...confusing I know
)
Post Fiend
Joined: Mar 2011
Posts: 8,501
Likes: 4
From: Lynchburg, VA
Location:
Ported vacuum and manifold vacuum are identical off idle. The difference is at idle, when ported vacuum will be devoid of vacuum.
Posting Guru
Joined: Nov 2011
Posts: 1,302
Likes: 5
From: Burlington, WI
Correct Devin about what the egr does. I forgot to add that pining may be a result. As far as vacuum #'s are concerned, at WOT there should be almost no vacuum because the throttle blades on the carb are open allowing air into the system. While cruising there should be some amount of vacuum. How much is in my engine at that time? I dont know.
@solo pilot: you should have the vacuum advance as you are accelerating, as that would change the internal advance of your distributor.So my answer is that you should have vacuum at the distributor if you are at partial throttle. (somewhere in between idle and WOT)
@solo pilot: you should have the vacuum advance as you are accelerating, as that would change the internal advance of your distributor.So my answer is that you should have vacuum at the distributor if you are at partial throttle. (somewhere in between idle and WOT)
Thread Starter
|
New User
Joined: Jan 2014
Posts: 19
Likes: 0
"The difference is at idle, when ported vacuum will be devoid of vacuum."
Does this mean once the engine is at higher RPM than idle it will have vacuum? but no vacuum when idleing? Sorry little confusing
Does this mean once the engine is at higher RPM than idle it will have vacuum? but no vacuum when idleing? Sorry little confusing
Thread Starter
|
New User
Joined: Jan 2014
Posts: 19
Likes: 0
Correct Devin about what the egr does. I forgot to add that pining may be a result. As far as vacuum #'s are concerned, at WOT there should be almost no vacuum because the throttle blades on the carb are open allowing air into the system. While cruising there should be some amount of vacuum. How much is in my engine at that time? I dont know.
@solo pilot: you should have the vacuum advance as you are accelerating, as that would change the internal advance of your distributor.So my answer is that you should have vacuum at the distributor if you are at partial throttle. (somewhere in between idle and WOT)
@solo pilot: you should have the vacuum advance as you are accelerating, as that would change the internal advance of your distributor.So my answer is that you should have vacuum at the distributor if you are at partial throttle. (somewhere in between idle and WOT)
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic 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
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Thread Starter
|
New User
Joined: Jan 2014
Posts: 19
Likes: 0
Does this effect how it runs? I will hook this up i, assuming it helps from taking in too much cold air?
Post Fiend
Joined: Mar 2011
Posts: 8,501
Likes: 4
From: Lynchburg, VA
The flap in the snorkel diverts air from the exhaust manifold to the intake to prevent carb icing during cold temperatures. It may or not be necessary, depending on where you live.
Thread Starter
|
New User
Joined: Jan 2014
Posts: 19
Likes: 0
I will get the air cleaner hooked up and the timing right tomorrow, I know you said timing should be @ 12 but my sticker on valve cover says 14.....prob doesnt make to much difference?
As for the EGR I will tackle that next week as I will have to figure out where vacuum lines for it go and come from and feel I have asked you enough questions. THanks soooo much for your time....its saved alot of head scratching!
As for the EGR I will tackle that next week as I will have to figure out where vacuum lines for it go and come from and feel I have asked you enough questions. THanks soooo much for your time....its saved alot of head scratching!
Thread Starter
|
New User
Joined: Jan 2014
Posts: 19
Likes: 0
Minnesota.....I better hook it up huh
