Drive distance shouldn't affect the vapor purge system.

When you say you "rebuilt the vacuum canister system" did that include a new charcoal canister?

Are you running a factory air cleaner assembly?

 

Saw a very similar product on two callus garage this weekend. This unit is pricey but it would appear to be the type of thing you are looking for.

https://www.vaportrapper.com/product

 

Saw a very similar product on two callus garage this weekend. This unit is pricey but it would appear to be the type of thing you are looking for.

https://www.vaportrapper.com/product

Holy Cow. That is pricy stuff. I get they don't want boats to blow up.

 

Drive distance shouldn't affect the vapor purge system.

When you say you "rebuilt the vacuum canister system" did that include a new charcoal canister?

Are you running a factory air cleaner assembly?

Drive distance shouldn't affect the vapor purge system.

When you say you "rebuilt the vacuum canister system" did that include a new charcoal canister?

Are you running a factory air cleaner assembly?

Yes, new canister. Delorean. Factory air cleaner.

 

Could you post some pictures of your setup? Vac lines, top of the canister?

I did similar on my 83 when I switched from the vacuum line spaghetti Carter carb to Holley EFI. I did the full system: new check valve off the tank, new DeLorean cannister, new 2 port coolant temp switch, and new silicone lines. The vapor cannister purge control comes from ported vac on the bottom of the throttle body, but doesn't open until the coolant temp switch recognizes its up to temp. The ERG is on this same coolant temp switch, but goes through an additional temp switch in the air cleaner housing.

Also, is the inlet flap on your air cleaner functioning? Even with the EFI (no gas sitting in the carb bowl), I can smell a little gas when I pull off the air cleaner lid. But no smell at all with the lid on.

And beautiful Jeep! My first CJ was a 6 cylinder 79 with the Renegade package, but in the lighter Alpaca Brown.

 

Also, is the inlet flap on your air cleaner functioning? Even with the EFI (no gas sitting in the carb bowl), I can smell a little gas when I pull off the air cleaner lid. But no smell at all with the lid on.

I believe the OP's '79 factory air cleaner housing only has the TAC flap, and not the second vapor flap that came on later models.

You bring up a good point about running the canister purge signal thru a CTO, so it only purges when the engine is up to normal operating temps.

 

The line going into the charcoal deally (green garden hose colored line) Is not only for vapors

It is the gas tank vent!

If it's "Check Valved" or similar, your tank want get air (vent) and fuel will be incapable of

being pumped up front.

Maybe your smell is just exhaust rich from the choke not fully opening on a short jaunt.

-----JEEPFELLER

 

I live in North Texas, we don't need no stinkin choke (it isn't hooked up)

 

I'm not shooting to save the planet so emissions aren't my main concern. Just eliminating as much gas smell as I can to keep the wife happy (as possible)

 

Choke = sucking in more fuel ---- in an attempt to get the Air/ Fuel ratio correct as it runs thru it's cycle to off

No choke may mean more air and not enough fuel (air/ fuel ratio suffers) until you reach operating temperature.

In ez terms, the exhaust be emitting a not so perfect burning of gases (fumes).

I have a manual choke on both of mine, in the winter I use it and maybe sorta "ween" it off until I reach operating temp (maybe 1-1/2 miles)

During the summer, I'll use the choke on my CJ2A till operating temp

On my '77 CJ-5 (258) I don't use it at all, I jump in and go!

However, since it's "cold" for 1-1/2 miles, I can tell it's not ready to race YET, and since the Air/ Fuel mix is not perfect yet

I dare not pull out in front of anybody YET, in Mr. Jeep, because he might SPIT or SPUTTER or even Quit.

After my 1-1/2 miles or so, I can cut it close when I turn in front of somebody.

Mr. Jeep has lived in the garage for long periods of time with no fuel smells,

but mostly stays in the driveway.

Willy is in there 100% of the time.

----JEEPFELLER

 

Looks like you have the same setup as me - minus the CTO valve. Not sure if the CTO matters with the smell - I think it just is there so it runs better before getting up to operating temp.

How do your lines out of the tank look? How about your rollover valve

 

I haven't dropped the tank yet. On my list. I'm assuming the rollover check valve in down under there some where?

 

Here is a pic of my frame before I put the new body on. The vent lines are on the drivers side and can be accessed with the tank in. Although not a bad idea to drop the tank and replace the rubber lines between the tank and the hardline. I left my vent lines extra long then shorted them when I installed the new combination check/rollover valve. Here's a link to what I used, it's a good upgrade if either of yours in the rear of the tub are shot. eBay Rollover Check Valve

 

Lots of good info here.
Thanks!

 

found the source of my gas smell. Accelerator pump diaphragm got a hole in it.
Love, love this corn gas.🤬