Unknown hose
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Unknown hose
I was pulling my spark plugs yesterday and accidentally ripped a hose that goes from the air filter housing down to a cylinder that sits just above the frame. Does anyone know what this hose is or what it does? I'll post pictures tonight when I get home. Also I'm not exactly sure what happened but after I put the spark plugs back in it now the engine makes a faint ticking noise when I get on the gas. Could this be the hose or something else? I have a 72 f100 with a 360. Thanks for all the help!
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If you're referring to a paper-like hose that goes down to a charcoal canister (9D653) on the right front frame rail, it is part of the emissions system for a vented fuel tank.
http://www.fordification.com/tech/im...cab-w-evap.jpg
http://www.fordification.com/tech/im...cab-w-evap.jpg
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Junior User
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If you're referring to a paper-like hose that goes down to a charcoal canister (9D653) on the right front frame rail, it is part of the emissions system for a vented fuel tank.
http://www.fordification.com/tech/im...cab-w-evap.jpg
http://www.fordification.com/tech/im...cab-w-evap.jpg
Logistics Pro
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No. No sound at all. It vents fuel vapor from the fuel tank, through the charcoal canister and then gets recycled into the air cleaner. It's just a vent hose.
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From: Simi Valley, CA
If you're referring to a paper-like hose that goes down to a charcoal canister (9D653) on the right front frame rail...
It is part of the evaporative emissions system (Evap/Em) for a non vented fuel tank.
http://www.fordification.com/tech/im...cab-w-evap.jpg
It is part of the evaporative emissions system (Evap/Em) for a non vented fuel tank.
http://www.fordification.com/tech/im...cab-w-evap.jpg
Evap/Em introduced in 1970, was installed initially in 1970/72: Passenger Cars/Bronco's/Econolines & F100's all sold new in CA .. Other states may have required it as well.
With Evap/Em, there is a fuel vapor valve located in the tank(s), vapor line(s) routes along the right frame rail to a valve on the charcoal canister located under the hood.
A corrugated (factory) paper hose routes from this valve to an elbow on the air cleaner. HIO's pic shows the auto parts store replacement hose, the original was black.
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Evap/Em: Non vented fuel cap, unleaded gas. The fuel filler tube(s) and the fuel tank(s) used with Evap/Em are also different.
Evap/Em introduced in 1970, was installed initially in 1970/72: Passenger Cars/Bronco's/Econolines & F100's all sold new in CA .. Other states may have required it as well.
With Evap/Em, there is a fuel vapor valve located in the tank(s), vapor line(s) routes along the right frame rail to a valve on the charcoal canister located under the hood.
A corrugated (factory) paper hose routes from this valve to an elbow on the air cleaner. HIO's pic shows the auto parts store replacement hose, the original was black.
Evap/Em introduced in 1970, was installed initially in 1970/72: Passenger Cars/Bronco's/Econolines & F100's all sold new in CA .. Other states may have required it as well.
With Evap/Em, there is a fuel vapor valve located in the tank(s), vapor line(s) routes along the right frame rail to a valve on the charcoal canister located under the hood.
A corrugated (factory) paper hose routes from this valve to an elbow on the air cleaner. HIO's pic shows the auto parts store replacement hose, the original was black.
Vented tank uses a non-vented cap.
Non-vented tank uses a vented cap.
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Ford Parts Specialist
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From: Simi Valley, CA
Non-vented tank uses a vented cap. 
Evaporative Emission uses a 4 'eared' non vented fuel cap, the fuel filler tubes are specific to this type of cap, unleaded gas is required.
No Evaporative Emission, the fuel cap is vented and has 2 'ears' on it, no unleaded fuel required.
There is no vent on the 1961/77 in-cab tanks, so it's muy importante that one uses the correct fuel cap. Optional auxiliary tanks might have a vent, might not if Evaporative Emission is in place.
And, the auxiliary tanks with Evaporative Emission are smaller than the non Evaporative Emission tanks (1967/72: 22.5 gallons vs 25 gallons).
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Who is starting the New Year off bassackwards? You are, kiddo.
Evaporative Emission uses a 4 'eared' non vented fuel cap, the fuel filler tubes are specific to this type of cap, the tanks are non vented, unleaded gas is required.
No Evaporative Emission, the fuel cap is vented and has 2 'ears' on it, no unleaded fuel required.
There is no vent on the in-cab tanks, so it's muy importante that one uses the correct fuel cap.
Evaporative Emission uses a 4 'eared' non vented fuel cap, the fuel filler tubes are specific to this type of cap, the tanks are non vented, unleaded gas is required.
No Evaporative Emission, the fuel cap is vented and has 2 'ears' on it, no unleaded fuel required.
There is no vent on the in-cab tanks, so it's muy importante that one uses the correct fuel cap.
Ev/em tank is a vented tank. Venting to the charcoal canister. Ev/em tank uses a non-vented cap.
Non-Ev/em tank (sans canister) is not vented and requires the use of a vented cap.
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From: Simi Valley, CA
D1PZ-9030-K & D1UZ-9030-A .. Fuel Caps non vented-Use with Evaporative Emission.
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Ford Parts Specialist
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Do y'all recall when Dan Quayle (George H. W. Bush VP), while attending a grade school spelling bee...misspelled potato as potatoe?
He was ridiculed by the news media for this gaffe.
He was ridiculed by the news media for this gaffe.