RUNNING RICH and how to adjust

[john chalk]

OK so fiddling with the climate control means I have had to idle the engine for an extended period resulting in a large black sotty mark on the driveway and fouled spark plugs.  cleaned the plugs and washed down the drive but is this an indication of rich mixture and if so is there an adjustment for mixture on the carter carbys?  have not looked in the service manual thought I would put it out here for comment first.

[Jason Edge]

I only have two options:
- Always display newest comments on the top of the wall
- Always display oldest comments on the top of the wall

and changed it back to the latter.

[john chalk]

better this way Jason. you see the latest gossip first.

[Jason Edge]

I accidentally changed the setting that makes most recent posts appear first (reverse chronological order) and think I like this better than everything going to the very end.  For example on this long thread I don't have to click page after page to see the most recent posts....they are up top.

I know this is something to get use to but think it will work better for us.  If the majority like the other way I can flip it back. Jason.

[Jason Edge]

That's the one.    It's the tank that allows up to 3 lock/unlock cycles per 1963 shop manual page page 16-24. Here's a picture from a 63 Cadillac with LH fender removed showing the large vacuum canister:

[Jason Edge]

I was referring to the large vac tank for power door lock & trunk release cars.

[Jason Edge]

Not a problem, Max. we don't know what to say or ask until we just jump in and start a discussion which you did.  I should have immediately caught the fact you have 3 nipples and a 63.  63's without power door locks or trunk release (most of them!) only have 2 nipples. 

64 was different in that all AC cars had the small storage tank that feeds the comfort control transducer, and if you had the power door locks or turnk release, you have a T fitting going to small tank, that then fed to the larger tank that goes inside the cab on the far left/driver side to feed those systems. You can see illustrations of the 64 system in the illustrations I uploaded yesterday at: http://6364cadillac.ning.com/photo/64-ac-vac-7-port-with-master-swi...

[Jason Edge]

This thread has gotten confusing as we have talked about 2 years, and different vacuum circuits.

Here are some things I can say regarding your 63.  

-  You have one vacuum line that goes to the forward lamp harness connector. 
- You have one vacuum line that goes to the throttle check valve (see fig 10-8 in 1963 shop manual). This was replaced with the spring and orifice type dash pot type early in the 1964 production as noted in service manual at http://6364cadillac.ning.com/photo/1963-cadillac-serviceman-pg53?co...

-  since you have a 3rd nipple, that would go to a vacuum storage tank.  In 1964 they used a smaller tank for the AC system but in 1963, if you had a/c but no power door locks or trunk lock you would not have a storage tank.  My question is: do you have power door locks or power trunk release and is their a large vacuum storage canister over under the left hand fender as you see in this link: http://6364cadillac.ning.com/photo/100-0526-1?context=album&alb...

I will end by saying I agree with Tony in that you need to plug these vacuum nipples, get the engine running right, then feed vacuum to each of the 2 (or 3 circuits if vacuun canister present) one by one.

 

[David Thomas]

Hi Max, The red hose should attach to the nipple on the white firewall wiring harness gang plug. As Jason mentioned one black hose off the manifold fitting goes to the throttle damper actuator at the firewall and the single unattached one out of the fire wall goes to the A/C idle up actuator on the right side of the carb. Your picture does not show enough of the third hose off the manifold fitting. Where does it go, is it attached to something? As Dave mentioned you may have a vacuum tank mounted behind the left wheel well on the firewall out by the fender. If so, it should have a vacuum hose from the manifold. HTH, David

 

[Jason Edge]

I'm seeing an older style Throttle Check Valve as we have discussed on the other threads. That 2nd loose hose would go to it.  I will post some vacuum related pictures later so you can have a visual on the check valve, etc.   For the large 2nd tank it simply T's in the line when you have that option.

Other loose hose over to the left (facing firewall) would go to the fast idle up vacuum control mounted on carb  that kicks in to force rpm up to 900-950prm when AC is on.

I've posted diagrams out of the shop manual that show you where the line out of that section goes to at this link: http://6364cadillac.ning.com/photo/63withacvacuum-1?context=latest

Depending on your carb you will have one if these two fast idle up controls:

For Rochester:
http://6364cadillac.ning.com/photo/idle-speed-up-control-diaphragm-...

For Carter:
http://6364cadillac.ning.com/photo/idle-speed-up-control-diaphragm-...

 

[Jason Edge]

The only reason the shop manuals (63 & 64) indicate to remove hose from emergency brake diaphragm is to allow car in drive, and idling with parking brake set.  It's easy enough to pull the hose and push a thick nail in the end. 
When setting the idle speed up  for AC equipped cars the 63 & 64 shop manuals have different in structions for setting but same result in setting rpm to 900 to 950rpm with A/C On.  The carb adjustment section is a bit misleading in that it implies you set rpm to 480pm with AC on.....but if your idle speed up control is working properly you would be sitting at a forced hi rpm.  I will also say that I understand setting the carb with everything connected, but I think that is more to take into account the "vacuum load" these systems put on the car and not actual leaks.  In fact if you scan through the 1964 model year serviceman bulletins there are several bulletins posted for testing for leaks and replacing these faulty parts. I will also say that in terms of dialing in your 49/50 year old car there there are many areas  such as the check valve, NSS, power servo, hoses, emergency brake, etc  and I feel safer (at least for now) discounting the various in car vacuum components until I am satisfied it is not affecting timing, etc.   In fact if you look at the back of my 64 CDV, I still have the rear intake nipple plugged from my engine rebuild as I don't have AC reinstalled in my car yet, and have remembered to manually release the park brake. With the new engine, carb and intake mods I just did not want any additional vacuum "leaks" or "load" to influence my current  emphasis on engine performance.   In the next few weeks I will remove my entire dash and will replaced all vacuum lines, and ....getting nervous now....jump into the AC system and after that will definitely fill better about setting timing, or adjusting the carb with everything "hooked up.".