'69 440 cutting out, help please!

[K9COP]

If you have the PCV hose going in where you do will it not just put the oily air into just one cylinder all the time ?
I think if it was at the front it would get mixed and go evenly every cylinder

Honestly, I don't know  I'm here to learn . So do I swap the large PCV hose from the intake to the large point on the front of the carb, and have the large hose from the brake booster go to the intake? If so, what do I do with the small hose/port that is attached to the carb and the PCV now?

I'm more of an OBDII kind of guy...sorry...

K9

[Dino]

Yeah I'd swap those hoses.  Pcv to the carb, booster to manifold.

[birdsandbees]

What ^^^ said ! Brake booster goes to the manifold port, PVC to the carb.

[K9COP]

Thanks guys. I'll do that. Do I leave the small hose on the intake port 'T'd' to the front of the carb?  Trying my best not to be spoon fed here, but just want to understand...

I'm absolutely NOT doubting anybody here, but trying to understand why.... could the car always have been running rough on one cylinder (rear right) because it was filling with dense, oily air?

K9

[Dino]

Ha I didn't even notice the hose going from intake tree to the carb!  Remove it and cap them.

Sure you can definitely have an unbalanced burn.  Check your plugs and find out.   

[K9COP]

Thank you Sir! I'll take care of the hoses tomorrow, and replace the plugs too. I have a set waiting, but was looking for a solution before I put another set in to get fouled up!

As always Dino, guys, thanks for being generous with your knowledge and time.   

K9

[BLK 68 R/T]

Once you do get the vacuum lines connected correctly, brake booster line to rear intake port, PCV line to front of carb large port, small line on the right front of carb should go to the distributor advance, cap the other one and no tee in the rear line. You will most likely also need to adjust your idle speed and ignition timing as well to compensate for all the changes being made to the vacuum system. Also don't forget to undo the vacuum line to the distributor and plug it when you are setting your timing.

[K9COP]

Once you do get the vacuum lines connected correctly, brake booster line to rear intake port, PCV line to front of carb large port, small line on the right front of carb should go to the distributor advance, cap the other one and no tee in the rear line. You will most likely also need to adjust your idle speed and ignition timing as well to compensate for all the changes being made to the vacuum system. Also don't forget to undo the vacuum line to the distributor and plug it when you are setting your timing.

Thanks for the information. I think the distributor advance should go on the left (drivers side) port though, as in the diagram I just found online below.... probably should have found this sooner...:



I'll put rubber caps over the tee on the PCV valve and the timed vacuum port on the Carb. Makes me wonder why it was done this way though.....

K9

[BLK 68 R/T]

I had mine hooked up to the right hand side on my 68 GTX and it worked just fine. Never tried the other one though. It also had the mopar electronic ignition dist. installed. Honestly I have no idea what the difference is in the vacuum signal between the 2 ports. maybe someone else will chime in with a more definitive answer on why to use one vs the other.

[K9COP]

I had mine hooked up to the right hand side on my 68 GTX and it worked just fine. Never tried the other one though. It also had the mopar electronic ignition dist. installed. Honestly I have no idea what the difference is in the vacuum signal between the 2 ports. maybe someone else will chime in with a more definitive answer on why to use one vs the other.

Looking at the diagram above, it seems to be just the difference between 'timed' vacuum and manifold vacuum depending on whether the vehicle is emissions controlled or not...

K9

[69wannabe]

Get a look at the spark plugs and see what they look like. Pic's of them would tell if you are too rich or too lean. I would plug off the vacuum advance on the distributor and run it without it hooked up. Mine has been plugged off for several year's with no issues. Chrysler's and ford's were bad about over advancing and causing it to spark erratically. Need to get your ignition system perfect then your carburetor will usually be easier to work with...

[K9COP]

Got it. Looking at my car, and the pictures again, and it has a small vacuum hose coming FROM the pcv on the right valve cover to the small right hand vacuum advance port on the carb, the a all hose going between the left (drivers side) vacuum advance port to the distributor..  Now that can't be right!


Pulling plugs tomorrow.

K9