Any suggestions for a charcoal caninster replacement for my 85'? I've seen alot of non-dodge versions from other makes which are more compact. The original is toast and so is the bracket my only concern really is the vacuum purge and are they really that different between fuel injection and carbed models?

Where are you located? I'm asking because you can find many that will physically work (even from different makes), but here in California you will fail the visual emissions regardless of whether it works or not.

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Im in Ontario Canada so no it wouldn't be as harsh as a Californian inspection but its getting there soon enough. I think visual would fool them anyways since Ill have to relocate it. Besides this is in rust belt some inspecters probably haven''t seen a slant in a long time if at all or lose interest all together I seen a Toyota one which is half the size and rectangular but I dont know if it has a vacuum purge.Theres a porsche one in a long narrow cylinder (we're talking used, Ebay here)

What is really wrong with the original? The people at NAPA told me that the replacement was a drop in 'filter' not an entire new canister.

The canister was mounted in a spot I needed to do some body work and the original spot is a no go to return there. The canister itself is/was crushed and the holding strap was rotted out besides its too large a unit to be pratically placed anywhere else when there are so many others that are half the size.

These canisters are very easy to adapt to non-spec applications. Your original probably has three ports: Tank vent, carb bowl vent, and purge. If you find a replacement with only one vent port ("tank", these are common on fuel injected cars that don't have a bowl vent) you can simply tee the carb bowl vent line into the tank vent line near the canister, then connect this composite vent line to the one and only vent port on the canister. Size does matter here; the late model units tend to be smaller because there's less vapour to handle (no hot carb pouring off vapours).

There needs to be a canister purge valve that only opens when the engine is above idle. Some canisters have these built in (looks like a round "flying saucer" atop the canister itself), but many do not, including Mopars after '72 and most late-model ones in which purging is controlled by the computer via a solenoid. Fortunately, standalone purge valves are readily available. NAPA Echlin # 2-28011:



Small fitting on the purge valve gets teed into the vacuum advance hose (which should have vacuum above idle, but not at idle). Big fittings on the purge valve go inline with "PURGE" hose from canister, which gets teed into the PCV hose. This is accomplished with a metal 1/4" × 3/8" × 3/8" tee, Dorman or Motormite #47009 or NAPA Balkamp #715-1817.

The reason there's no purge valve on most of the Mopar canisters is that the "purge" port on the original-equipment carburetors, starting in '73, were set up so as not to have vacuum at engine idle. This is not as good a method as a separate purge valve, but it was cheaper to build.

A note on sourcing the canister: Think carefully before slapping in any ol' used canister. They last a long time but not forever, and when they begin to break down they will spit bits of charcoal into your carburetor, making a real mess of things. You can put a band-aid on this by putting regular fuel filters in the hoses running from the carb bowl vent and purge port to the canister, but that's all it is -- a band-aid. Get a good canister to start with and you'll never have to think about it again (at least not for a few decades). They are functionally all pretty much the same no matter what make of vehicle they originally went on; all you have to do is make sure the one you get has at least the ports you'll need. GM and Ford canisters for carbureted cars are still available in the aftermarket. Mopar-spec canisters are not serviced in the aftermarket. Chrysler P/N 4723 551 is a 4-port service replacement for many '80s-'90s applications and can readily be adapted to earlier cars. You need two vent ports ("Bowl" or "Carb" and "Tank"), and one purge port ("Purge"). Plug any unused ports. The bracket can be snagged from any '72-up A-body, and is not a high-demand part so shouldn't be difficult to get.

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