Getting ready...

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Nick I owe you a beer.
Pulled the pump again (fourth time) nocked the spacer off, cleaned the surface and it fired right up. Well it fired, I needed to choke it to start and had to keep the choke on at about a 1/4 to keep it running.
I assume that I need to figure out the vacuum lines now. I tried to install the air cleaner but that did not make a difference in the idle.
So I played with paint to see if there are some specifics. Note this is a 1980 with a 1978 desmogged carb,
point a according to what I have read will be capped
point b I have no freaking clue, Currently I have it connected to point D2.
point c has a single lead wire, As per what I have read it is a delete.
Point D1 loops down and connects to D2, Can't really see d2 in the pic.
For Giggles once I had the air cleaner on I connected d2 to the port on the upper case of the air cleaner. No change there.
Any thoughts and guidance are appreciated.
Dave
IMG00124.webp
 
Glad you found the spacer. That one got me once too.

The electrical connector is NOT a delete. That is the idle cut solenoid. It gets connected to a spot where it is hot for both start and run and off when the key is turned off. This is part of why you can't get it to idle without the choke.

The large "vacuum line" off the top of the carb is for vapor recovery. IIRC it should go to the charcoal canister on the passenger side frame rail. My 60 had a hard line on the firewall from the canister to the carb. Rubber line will work fine.

I think "b" goes to "d1" and "d2" goes to the distributor. Jim will have to confirm that as I'm not next to a carb'd truck right now.

Nick
 
Well,
Its running pretty dang well. I found a 12 volt switched line in the egr wiring and used that, It idles fine now. For now D2 and B are connected, D1 and D2 are already connected now so I let them be. The timing adjust is set to the vacuum port on the other side of the carb. I do not have a charcoal cannister on it for now so A is capped off.
On to the air cleaner body, Port 1 will be blocked off.
Port 2 I have no idea I can Block it unless it goes to the D1 or D2. Or ??
Port 3 again no clue, There is a line coming from the crank case on the passenger side of the block that I can maybe see coming into there. It does have a PCV like valve on the base of the block and an approx 3/8 inch line attached to it. There is also a line with a sponge type filter sticking up out of the top of the valve cover. Perhaps this is what connects to it.
Port 4 looks like a vacuum line and has a small filter like thing on the inside of the of the upper portion of the air cleaner. I assume This goes down to the Dizzy cap vent port.
So what else am I missing or screwing up
IMG00109.webp
 
PCV valve on the passenger side connects to the large tube on the carb insulator plate. Port 3 on the air cleaner goes to the valve cover where you have a breather now. The large tube opposite port 3 would go to an air pump so you can plug that one. The port on the air cleaner that faces the passenger side is for the distributor vent line system. You'll need to look at a FSM for that one as it's more than just a hose to the dizzy cap. Of course one trip to visit Jim will solve all these issues as he can do this off the top of his head!

Nick
 
In post #41,
"A" goes via about 1 foot of rubber hose back to a same size vapor tube that is mounted to the firewall. Tube originates at top of canister. If canister is missing, then cap off A.

"B" goes to a manifold vacuum port, possibly in manifold ahead of carb or side of insulator baseplate.

"C" connects to switched12V source.

"D1" connects to the Hot Idle Compensator (little metal box).
"D2" connects from bottom of HIC to manifold vacuum in the side of the the insulator baseplate.
 
PCV valve on the passenger side connects to the large tube on the carb insulator plate.
Click to expand...
The PCV usually connect to a manifold fitting located on the side of the intake.

Of course one trip to visit Jim will solve all these issues as he can do this off the top of his head!
Click to expand...
Oh yeah, I will be in Strongsville this weekend for family stuff. That is much closer to you than Lancaster. Gimme a call.
 
So D1 Gets left where it is,
B and D2 can go into the spacer block under neath the carb.
A gets Capped off
3 goes to valve cover, Should there be a pcv line there or is it just open line from 3 to valve cover?
Let me play with this tonight, I might take you up on that Jim, It ran pretty dang well last night but needed a little choke at first to idle. once warm it was fine but damn does it idle low.
I am a happy Bastard for sure.
Dave
 
PHAEDRUS said:
So D1 Gets left where it is,
B and D2 can go into the spacer block underneath the carb.
Click to expand...
Either one can go there. But the 2 fittings on the spacer are different sizes. The smallest one is still bigger than standard toy vac fittings. It is for the HIC. The larger fitting is quite a bit larger than vac hose. It is for the defunct canister purge system.

For best results:
connect D2 to the small fitting on spacer.
Cap large fitting on spacer.
Connect B to a manifold vac fitting in the intake manifold.

A gets Capped off
3 goes to valve cover, Should there be a pcv line there or is it just open line from 3 to valve cover?
Click to expand...
Open hose from VC to AC.
PCV is located on the lifter cover on pass side of engine. PCV hose loops up over engine and connects to fitting on outside of intake manifold.

Let me play with this tonight, I might take you up on that Jim, It ran pretty dang well last night but needed a little choke at first to idle. once warm it was fine but damn does it idle low.
Click to expand...
The idle speed screw can be adjusted to your preference. It was set to about 600 on the test engine, but results can vary.
 
So I think I have it licked.
Runs great, Had to adjust the fuel level a bit as it was a little rich but used the Romer tighten till you max vaccum to set it and it appears to be ok.
The only issue I have now is the pcv line on the side of the crank case. Should this be going to vacuum on the intake or ?? as of now it is looped up and over the engine, into a hard line that is connected to nothing, Plan is to put a one way fuel type filter on the end to keep debris out but let it breathe.
Thank you all for the help.
Dave
 
Pics will come tonight, I have no egr left on the truck, I have some really cute block off plates though??
Dave
 
So here is directly below the spacer plate where the egr would have been.
any thoughts on where to stick this thing now??
Dave
IMG00132.webp
 
PHAEDRUS said:
So here is directly below the spacer plate where the egr would have been.
any thoughts on where to stick this thing now??
Dave
Click to expand...
Rats, boned by the PO again...

I would either:
source an unmodified side plate and only cut & weld the EGR, leaving PCV.

or

Drill through the weld on side plate, tap for NPT thread and install the stock threaded 75-78 PCV elbow.
 
Is it just a straight elbow flow though piece or is ther a check valve in it somewhere?
Dave
 
Just a straight in connection to manifold vacuum. The important thing is that it is at the center of the manifold, because the PCV system is a constant source of oil vapor, and a constant vacuum leak, so it needs to be equally distributed to all cylinders.
 
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