Vacuum Hoses
Thread Starter
|
Senior User
Joined: Jan 2000
Posts: 107
Likes: 0
Vacuum Hoses
Hello all;
I was replacing an exhaust manifold gasket (right/passenger side) the other day and knocked a vacuum hose off the PCV valve and can't figure out where it was connected.
This is on an '88 F250SC 4x4 460. The PCV valve has a plastic fitting with three hoses, the first goes backward to the FI manifold, another to the evaporative canisters near the front of the engine. The third comes off the topmost fitting on the PCV, right now it's plugged, the engine seems to idle and run fine, but I'd like to know where it belongs.
Any ideas????
Thanks in advance for your help.
Paul
I was replacing an exhaust manifold gasket (right/passenger side) the other day and knocked a vacuum hose off the PCV valve and can't figure out where it was connected.
This is on an '88 F250SC 4x4 460. The PCV valve has a plastic fitting with three hoses, the first goes backward to the FI manifold, another to the evaporative canisters near the front of the engine. The third comes off the topmost fitting on the PCV, right now it's plugged, the engine seems to idle and run fine, but I'd like to know where it belongs.
Any ideas????
Thanks in advance for your help.
Paul
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
Vacuum Hoses
Paul,
If the emission decal is still mounted to the hood , sometimes they are on the radiator support , they usually give a basic vacuum hose layout . Another thing to do is attach the hose to the pcv , its only so long and its other connection should be within the length of the hose . Sometimes they are hard to find ...trying to recall where it might go but Im drawing a blank .
Paul
If the emission decal is still mounted to the hood , sometimes they are on the radiator support , they usually give a basic vacuum hose layout . Another thing to do is attach the hose to the pcv , its only so long and its other connection should be within the length of the hose . Sometimes they are hard to find ...trying to recall where it might go but Im drawing a blank .
Paul
Thread Starter
|
Senior User
Joined: Jan 2000
Posts: 107
Likes: 0
Vacuum Hoses
Paul;
Thanks for the tip, the emissions decal is in my glovebox, looks like it stripped off. I'll check again tomorrow in the daylight. I hooked up the hose when it came off and looked all around within the radius of the connection, but no luck, probably would have helped if it wasn't dark and at the end of a 12 hour workday. The Chilton manual isn't much help either, some schematics, but sounds like each engine and year have their own setup, with different setups for California emissions. Do you know if the factory manuals for each year have better detail on all systems?
Thanks, Paul
Thanks for the tip, the emissions decal is in my glovebox, looks like it stripped off. I'll check again tomorrow in the daylight. I hooked up the hose when it came off and looked all around within the radius of the connection, but no luck, probably would have helped if it wasn't dark and at the end of a 12 hour workday. The Chilton manual isn't much help either, some schematics, but sounds like each engine and year have their own setup, with different setups for California emissions. Do you know if the factory manuals for each year have better detail on all systems?
Thanks, Paul
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
Vacuum Hoses
Paul,
Let me just clarify , the Pcv did have the 3rd hose connected somewhere before it got knocked off , Correct ? Ive searched thru my manuals , but unfornately I cant locate one for your truck / engine . Your engine has California Emissions ? Living in the South I dont often have the opportunity to work on Calf. Emmisson engines and have few references to such . I hear ya on the long work days , try looking in the light with some sleep . Im sure it wont adversly affect the engines performance if its left off .
Paul
Let me just clarify , the Pcv did have the 3rd hose connected somewhere before it got knocked off , Correct ? Ive searched thru my manuals , but unfornately I cant locate one for your truck / engine . Your engine has California Emissions ? Living in the South I dont often have the opportunity to work on Calf. Emmisson engines and have few references to such . I hear ya on the long work days , try looking in the light with some sleep . Im sure it wont adversly affect the engines performance if its left off .
Paul
Thread Starter
|
Senior User
Joined: Jan 2000
Posts: 107
Likes: 0
Vacuum Hoses
Paul;
Not sure if it was connected to anything or not, I think so because of the noise it makes, didn't notice it before. No California emissions on my vehicle, it's a 49 state vehicle, I'm in Washington state. Just commenting that it seems like Ford has a different configuration for each vehicle and a separate configuration for California for each model year and engine.
It must make it difficult for somebody like Chilton or Haynes to address each configuration when they build a manual to cover things for 10-15 model years.
Thanks for checking, I appreciate your effort. I'll check it again later this week, and you're right, it doesn't seem to make much difference in how it runs, plugged off or open.
Paul
Not sure if it was connected to anything or not, I think so because of the noise it makes, didn't notice it before. No California emissions on my vehicle, it's a 49 state vehicle, I'm in Washington state. Just commenting that it seems like Ford has a different configuration for each vehicle and a separate configuration for California for each model year and engine.
It must make it difficult for somebody like Chilton or Haynes to address each configuration when they build a manual to cover things for 10-15 model years.
Thanks for checking, I appreciate your effort. I'll check it again later this week, and you're right, it doesn't seem to make much difference in how it runs, plugged off or open.
Paul
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
Vacuum Hoses
Paul,
The reason I asked is because a lot of Ford Pcv Valves are the same but have vacuum ports that arent needed for all applications . The engines that dont use the vacuum ports usually have the unused ports blocked off with a rubber plug . Im wondering if some where along the way yours was lost and you never noticed it until you did the valve cover work ? I know on my 300 the Pcv valve has a vacuum port but its not used , just the pcv hose is attached . A simple way to check is purchase a new on from Ford , the parts guy will have a diagram showing what , If any vacuum lines should be attached to your application .
Paul
The reason I asked is because a lot of Ford Pcv Valves are the same but have vacuum ports that arent needed for all applications . The engines that dont use the vacuum ports usually have the unused ports blocked off with a rubber plug . Im wondering if some where along the way yours was lost and you never noticed it until you did the valve cover work ? I know on my 300 the Pcv valve has a vacuum port but its not used , just the pcv hose is attached . A simple way to check is purchase a new on from Ford , the parts guy will have a diagram showing what , If any vacuum lines should be attached to your application .
Paul
