Vacuum line question, 84 Cougar V6 (pics) July 10, 2009, 02:28:24 PM I have a vacuum line that is plugged with a screw in the whole mess of stuff behind the coolant tank. I'm fairly sure the other side is what hooks up to the back drivers side of the CFI. The Emissions info sticker shows that it goes to the last solenoid , but there is no port for it to hook up there. Any suggestions on where it goes? Thanks!EdFirst pic shows the line of solenoids and the plugged line. Second pic is the last solenoid from the bottom. Third is the Emissions sticker. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #1 – July 10, 2009, 05:13:38 PM this situation isnt causing any problems with it running or is this just out of curiousity? just askingam i blind or does that diagram not show the PCV valve in it?im guessing they plugged the soliniod because it was shot but that doesnt help you out with your question.did you try moving that little piece of hose which "looks" like its going to the other soliniod? because i dont think my mustang was like that(84 v6)ill see if i can find pics of it in my old computer. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #2 – July 10, 2009, 06:12:04 PM Thanks for the response.The car does idle a bit funny when its cold, but after warming up for a few minutes is fine. I kinda figured it was just acting up from being in storage so long. Also likes to stall when put in gear. The PCV is under the glare from the flash, sorry!I did try to move the little piece of hose and it is indeed attached to its neighbor. I just dont see where this line would connect if it wasn't capped. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #3 – July 10, 2009, 08:12:23 PM The solenoids operate vacuum valves.The EGRV is the vent valve for the EGR.The EGRC is the control valve for the EGR.The control valve applies vacuum to open the EGR valve.The vent valve lets air into the line to let the EGR valve close.There is a nipple for that hose right under where the wires plug into the EGRV.The hose brings "clean" air down from the air cleaner.You are operating on "dirty" air. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #5 – July 10, 2009, 11:15:17 PM Awesome, thanks for the pic! I guess i didnt see it at first cuz on mine it is covered by a black plastic cover, as if it has never been used. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #6 – July 10, 2009, 11:27:09 PM So if the vent valve wasnt hooked up to let air in to close the EGR, does that mean the EGR was always open? Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #7 – July 11, 2009, 09:41:55 AM Quote from: Loaded87IROC;281681So if the vent valve wasnt hooked up to let air in to close the EGR, does that mean the EGR was always open?If that black cover was air tight it would screw up the EGR operation by holding it open when the EEC wanted to close it.I suspect that you have a newer design and the foam pad is the air filter. So you probably don't need the hose that goes back to the CFI air filter. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #8 – July 11, 2009, 10:09:14 AM That makes sense. The foam pad was kinda crumbly so I just went ahead and hooked the line up where it was supposed to go.Thanks for the help! Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #9 – July 12, 2009, 02:01:00 AM the white line goes to the pass side smog piping along the exhaust maningold. the black line will also go to a vac operated diaphram on its own device.Before you hook it up,,,,,leave teh screw in place and go to the end of the white line. suck on the line and see if the suction holds your tongue to the fitting. if it does not, find the break.I would check all the plastic lines as they are all straight shots to the solenoid bank except for the red line. the red will split off at the intake so just plug off and test as required.with the car running, you should undo each one and spray wd40 in there to lubricate the solenoid and the interior of the line. WD also helps loosen and break up small carbon build up. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #10 – July 12, 2009, 10:11:17 AM Thanks for the response Scott!I did the suck test on the end of the line with the screw in it and it did go to the back of the CFI unit on the drivers side. Is that the line that should be going to the pass side smog piping? Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #11 – July 12, 2009, 11:22:44 PM none of any "white" tubing should be terminated to the cfi.teh only color attached to the CFI would be RED.To answer your question,, yes,,,,the white line should be a direct shot from the solenoid , up and over the engine and down on the pass side to the smog.Your OEM sticker is correct and i would inventory your vac connections. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #12 – July 13, 2009, 06:02:19 PM Quote from: jcassity;281982none of any "white" tubing should be terminated to the cfi.teh only color attached to the CFI would be RED.To answer your question,, yes,,,,the white line should be a direct shot from the solenoid , up and over the engine and down on the pass side to the smog.Your OEM sticker is correct and i would inventory your vac connections.His vacuum diagram decal shows a white vacuum line (although it is not used for vacuum in this case) from the EGRV to the EFCA (Electronic Fuel Control Assembly). Another name for the CFI.This matches his picture of the vacuum lines.The TAB and TAD solenoids are for the Smog. Quote Selected
Vacuum line question, 84 Cougar V6 (pics) Reply #13 – July 13, 2009, 07:33:09 PM Solenoids Quote Selected
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