Question 1: I have an air cleaner with "snorkel" and air temp sensor. My question is shouldn't there be a tube running from the snorkel to the exhaust manifold? On every vehicle that i've seen this system on the tube was there but I cant seem to find where one would go.
Question 2: Should my engine have an o2 sensor? If so where would it be located because i've looked all over and can't seem to find one.
84 D150 5.2 318 2bbl Holley carb
Speed Dragon
05-17-2009, 01:56 PM
There is supposed to be a tin heat stove around one manifold w/ a round outlet for the tube to hook to that runs to the air cleaner.
And it will only have an )2 if it has a feedback carb, ie if it has the Lean Burn system on it.
six popper
05-17-2009, 02:12 PM
If it does have the lean burn geet rid of it. Install a electronic ignition setup with a vacuum advance canister, and a non feed back carb from a earlier 318.
Ronb2285
05-17-2009, 02:51 PM
Thanks! As far as I can tell it doesn't have lean burn on it. I didn't see a place to connect the heat stove but ill check again just to be sure.
bherder
05-17-2009, 03:58 PM
Yeah as Speed says .... There should be (And 'Should Be' ain't always 'Is') a sheet-metal whossit around the exhaust manifold.. (They rust and fall off, OR the previous owner yanked it off, because one of bolt-ears broke and it was rattling around)
Anyway, when the engine is cold, there is a vacuum-actuated flap in the snorkel so that the air intake will pull air from around the exhaust manifold. Hot air. There should be a temp sensor in the air filter housing that will sense the hot air... Open another valve, which will let engine vacuum to the solenoid on the snorkel, which will move a flap, that will change the air intake from being pulled around the manifold to (Theoretically ;) ) cold air....
This is a great thing for when you live where I do and temps are below freezing for a good hunk of the year, so as to help the carb/manifold heat up quick, with no icing ... If you're in AL. .... I'll take a WILD guess and predict it doesn't get that cold there very often ... ;)
Unless you need it for 'smog' inspection ... Where you're at ... I wouldn't even worry about it.
If you DO need one... You can get one from a junk yard or you can get a 'universal' type at an auto parts store ..
O2 sensor .... I would THINK an 84' would have one, but don't take my word for it... Look down around where the Y-pipe comes together. Possibly on the passenger side. There may not be a sensor in it, but you may see a fitting in the exhaust pipe with a plug in it...
Speed Dragon
05-17-2009, 04:05 PM
Actually, the flap is normally closed, vacuum is applied to open it and pull hot air off the manifold.
bherder
05-17-2009, 04:15 PM
Yeah, well, something like that ... :D:D:D
It's a 50/50 shot on me remembering the right way ;)
Hey! I'm old .... Quit pickin' on me! :D
Speed Dragon
05-17-2009, 06:34 PM
Yeah, well, something like that ... :D:D:D
It's a 50/50 shot on me remembering the right way ;)
Hey! I'm old .... Quit pickin' on me! :D
