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The quick question is, what is Part #ford E3TE-9G464-F1C? I can't find it listed in the sources I've checked.
My 1984 Bronco was bought used in 1986 after the dealer had replaced the orignal engine with a rebuilt one. The top of the air cleaner says 5.8 Liter H.O. but I'm not at all sure the engine meets that description.
I bought the shop manuals for that year model when I bought the vehicile but I still can't identify the part or its function. It is a vacuum operated valve whick mounts in the intake manifold below the throttle linkage. It appears to allow gasses from the engine to be drawn into the intake when vacuum is applied to the unit.
The schematic for the 5.8 liter engine shows nothing in that location and the one for a 5.0 liter shows a Intake manifold heat control which looks similar but is on the passenger side of the manifold.
I'm attempting to switch to an Edelbrock carb and the linkage will not clear this valve, whatever it is. I'm wondering if it can just be removed, and what impact that would have on performance.
Jim i feel this may be what this is.Is there a carbon canister hooked up to this valve.( HAYNES #36058-MANUAL)covers this in section 6-5 this book is for broncos 1980-1996 and is part of the emmissions control systems .Inlater years --doesnt say which years they called it this ,earlier years (thermal vent valve).When ported vacuum is generated(engine running)and is not at idle,the stored vapors must find its way into the intake manifold for burning in combustion process.TR
Thanks for the reply. The part isn't connected to the cannister. It is mounted in the intake manifold with two bolts and has a gate type valve which is vacuum operated. When opened it allows the intake manifold to draw gasses from below (maybe a port on the head or directly in the engine block - can't tell).
I've about decided to just add a 1" spacer below the carb which should allow the linkage to clear the diaphragm on the valve.
i think it is a warn air choke so when it is cold out it can draw it from the warn air. Im not 100% sure but mine is not hooked up either and I just cut it off and nothing has happened from it. I left the part in that was in the manifold
This valve warms the air/fuel mix as it goes through the intake, (an intake heater..). It's a lot like the bypass valve on a air cleaner snorkel, get things warmed up quick when you first start the truck. You hook it up so that it turns off when the EGR kicks in.
That said, it's been my expirence that it's more trouble than it's worth to fix. The passages in the intake fill up with carbon, the flapper door rots out and the rubber diaphram in the actuator cracks, because of the heat. If you ever take the intake off and feel like cleaning it up, it would be a project to replace, but it's up to you.
Making sure the EGR and air bypass heater work well make more of a difference.
Thanks for all the suggestions. I finally found the part number in the Ford Shop Manual I have and it is an intake manifold heat control valve. So the suggestion that it serves to supply warm air to the intake seems reasonable. I am glad to know disabling it hasn't had a negative impact on operation.
If the air it provides to the intake is coming from the crankcase, it could be serving a dual purpose by burning any blow by gases, but my guess is that's not the primary function.
I'm mechanically inclined but I'm not a "car guy" so I appreciate all the help.