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Hi everyone.
First of all, I am from Chile and we speak spanish, so is hard to me write and explain my truck questions... I will try, here we go:
I'm trying to pass emissions, and I'm preparing te exhaust system and vacuum lines for this. FYI my truck is a 1994 4.9L 6 cylinders. I've replaced just the catalytic converter (no the entire pipe), and now I'm checking the vacuum lines. I have the vacuum hose routing that I attached
Is hard to me get the diagram (Mainly because I dont get english abbreviations I guess). This is what I knowm, If you can add something I will appreciate that:
ENG: english? lol I don't know this one
CAT: Catalytic converter?
Vreser: Vacuum reservoir
FPRC: Fuel Pressure Regulator Control (What part is this?)
MAP: sensor map
MAN VAC: manifold vacuum
EFCA: Electronic Fuel Control Assembly
PCV: Positive crankcase ventilation (Is it correct?)
I've assumed some routes, but the next ones, I dont know where they go to (next image):
I suppose these (1 and 2) ends here:
But I'm not sure. Somebody can tell me if is like this or I'm in the wrong way? I really appreciate that.
The other question is about the next canister corrugated hose :
Where it should goes to? I have no idea.
One more: I have removed the smog air pump time ago because it didn't work anymore. I must to reinstall an air pump to get the vacuum system works properly? Or this pump is for another purpose?
First of all, I am from Chile and we speak spanish, so is hard to me write and explain my truck questions...
Good to know, but it's already in your profile, so it shows as your location.
Originally Posted by JP Rey
I will try...
I can tell - your writing and your post are better than many Americans'. But it might be even better if you write in your native language, and then use Google to translate it into English. It might not translate the technical terms correctly, but you can fix those after it translates most of what you write.
Originally Posted by JP Rey
FYI my truck is a 1994 4.9L 6 cylinders.
It would help if you put ALL the truck's details into your signature as this page explains:
Is hard to me get the diagram (Mainly because I dont get english abbreviations I guess). This is what I knowm, If you can add something I will appreciate that:
ENG: english? lol I don't know this one
CAT: Catalytic converter?
Vreser: Vacuum reservoir
FPRC: Fuel Pressure Regulator Control (What part is this?)
MAP: sensor map
MAN VAC: manifold vacuum
EFCA: Electronic Fuel Control Assembly
PCV: Positive crankcase ventilation (Is it correct?)
ENG = engine, meaning the upstream secondary air check valve in front of the intake manifold
CAT = catalytic converter, meaning the downstream secondary air check valve below the rear of the intake manifold
VRESER = Vacuum Reservoir (the coffee can on the right wheelwell)
FPRC = Fuel PRessure Control (fuel pressure regulator on the back of the fuel rail)
MAP = MAP sensor on the evaporator cover
MAN VAC = Manifold Vacuum tree in the middle of the intake cage pointing to the right side
EFCA = I'm not sure what the abbreviation is for (it might be what you suggested), but it's the intake plenum on top of the engine
PCV = Positive Crankcase Ventilation valve on the top rear of the valve cover
CANP = Canister Purge solenoid valve, hanging inside the intake cage
VCKV = Vacuum Check Valve
SOL V = Solenoid Valve (the CANP & EVR are also solenoid valves)
EVR = EGR Valve Regulator
AIR B = secondary Air Bypass valve control
AIR D = secondary Air Diverter valve control
AIR B / AIR D = secondary Air combination valve (the object with 2 vacuum motors in your next picture)
Nowhere - it's an open air intake for that filter. The corrugated hose should be longer, and tucked inside a hole in the inner fender, but it doesn't matter.
Originally Posted by JP Rey
I must to reinstall an air pump to get the vacuum system works properly? Or this pump is for another purpose?
Vacuum comes from the engine; the secondary air pump supplies air to the catalytic converter.
Thank you Steve83 for the complete answers!
I will complete information about my truck in my profile. I'm new here and this was my first post. Today morning I was looking for the smog air pump in local stores and nobody knew that component, lol.
So tomorrow I will work in those vacuum lines. Thanks again!
Steve,
Thank you for your posts, they help me to understand my truck better. 91 f150 xlt 4.9cid
I have a question. Would either of these or vac leaks around them cause my fuel injectors to not fire? AIR B = secondary Air Bypass valve control AIR D = secondary Air Diverter valve control
Vacuum lines 4.9
Nowhere - it's an open air intake for that filter. The corrugated hose should be longer, and tucked inside a hole in the inner fender, but it doesn't matter.
