79 2000 Carb/Intake Manifold Swap (to 78 1.8L)

[FiatBen]

Since my charcoal cannister is long gone, do I just plug the two lines on the carb, or loop them? Also, should I do something with the tank vent line laying at the bottom of the engine bay that goes from the cannister back to the fuel tank?

[bradartigue]

Since my charcoal cannister is long gone, do I just plug the two lines on the carb, or loop them? Also, should I do something with the tank vent line laying at the bottom of the engine bay that goes from the cannister back to the fuel tank?

Never loop them, always plug them. You can plug the vent return line. I would suggest a fuel return loop; if your carburetor has two fuel connections then hook them up, otherwise use a fuel filter with a return.

[FiatBen]

Never loop them, always plug them. You can plug the vent return line. I would suggest a fuel return loop; if your carburetor has two fuel connections then hook them up, otherwise use a fuel filter with a return.

I'm not sure this is all that clear to me. Is the vent return line you refer to the one that is loose in the bottom of the engine bay that used to connect to the cannister?

As best I can tell, the 32ADFA has 5 fuel-related connections; the inlet and return that feeds the bowl, the in/out connectors at the bottom of the carb for the cannister, and a 5th connector that is directly in front of the vent valve assembly and bowl vent rod on the engine side of the bowl cover assembly. I'm still trying to figure out what that connects to. Guess I could always go look under the hood on the '77, assuming it will be basically the same.

[FiatBen]

The "new" manifold is in:


And, of course, I have questions.

I had to shorten the vacuum line to the brake booster as it connected in a different place than on the old '79 dual-plane manifold:


I'm wondering if I can remove that small vacuum ell and just plug the hole (M10 x 1.5)?

And I'm really not sure about hooking up the vacuum advance on the distributor. On the '79 manifold/carb setup it was to a connection that doesn't exist on the 32ADFA.



Is this enough vacuum or should I connect it to the ell so that it is pulling directly off the manifold instead of thru the carb?

And I still have a vacuum line (I think) that runs into the transmission tunnel. If anyone could enlighten me on that one, that would be a big relief.

[FiatBen]

I've got the '78 manifold and carb in the '79. I was checking the movement of the throttle linkage. It seems like the carb can't fully open the secondary. I think it has something to do with the second cable on the linkage which I can trace back to the tranny tunnel, but haven't crawled underneath yet. My guess is that somehow this is part of some kick-down linkage, but I don't understand how it all works.



Are there any modifications I need to make to the throttle linkage in converting the '79 back to a '78 carb (32ADFA)? or ???

[FiatBen]

and another thing.....

I replaced the ratty fuel line on the carb's return. At the time I didn't think anything of it, but I left this little gizmo out:


Is this some type of check valve? Do I need it? (Honestly, I know I could go take it off the old lines, blow/suck and test it out, or spend hours digging thru literature and answer this all by myself, but I'm tired from rehabbing the interior.)

[MrJD]

In your dist vac image, I think the line is to be attatched to what you have blocked off with a yellow cap. And yes, that is likely a 1 way valve to keep fuel from draining out from the carb. I plan to use one just to make starting a little faster. Nice work. Did you drain the cooling system all the way, or just out of the head?

[FiatBen]

In your dist vac image, I think the line is to be attatched to what you have blocked off with a yellow cap. And yes, that is likely a 1 way valve to keep fuel from draining out from the carb. I plan to use one just to make starting a little faster. Nice work. Did you drain the cooling system all the way, or just out of the head?

Yeah, I found the info today that told me I had the distributor hooked up to the wrong nipple. Thanks for the confirmation.

I figured as much on the little valve. Guess I'll cut it back in..

I drained the cooling system. Have it refilled and bled (without running yet, using tee in heater hose). Trying to sort out an overheating issue. Discovered the PO has the cooling fan wired to a rocker switch on the console. The fan switch at the radiator has a broken connector plug. Was wondering if there is anyway to test the radiator fan switch without heat?

[MrJD]

those one way valves are very cheap, buy a new one so you know there are no issues with it. I'm going to do the same, and run a clear glass fuel filter so I can make sure it works.

[bradartigue]

You have the distributor vacuum on the PCV port. Plug the port you have labeled "to distributor" and plug the distributor into the one you have with the yellow cap.

And replace that nasty, ancient, leaking fuel line before you blow up.

[MrJD]

Ben.

Have you removed any of the EGR related parts between the cam towers? Pictures would be cool. Maybe brad can chime in on what can go.

[FiatBen]

You have the distributor vacuum on the PCV port. Plug the port you have labeled "to distributor" and plug the distributor into the one you have with the yellow cap.
And replace that nasty, ancient, leaking fuel line before you blow up.

Done, and done! (See previous couple of posts). Thanks. Now, where do i hook up the tranny line?

[bradartigue]

You have the distributor vacuum on the PCV port. Plug the port you have labeled "to distributor" and plug the distributor into the one you have with the yellow cap.
And replace that nasty, ancient, leaking fuel line before you blow up.

Done, and done! (See previous couple of posts). Thanks. Now, where do i hook up the tranny line?

What's a tranny line? If it is an automatic then I don't know. Install a manual transmission and you won't need a tranny line.

[FiatBen]

What's a tranny line? If it is an automatic then I don't know. Install a manual transmission and you won't need a tranny line.

Yep, automatic. Swap? Not happening. This appears to be a vacuum line to the automatic transmission. The various aftermarket manuals have very little to say about automatics, mostly "it's technical, take it to a shop."