Latest post of the previous page:Wow, thanks for the quick feedback.
Not anymore. Used to, but after my first round of adjustments it idles right around 1,050 rpm consistently once warm.a) do you have too fast of an idle speed (recommended at 1,050 rpm max
For STEP 1: Set Throttle Stop Screws (Diagram 1 #5)
Stop screw adjustments are purely mechanical and are not affected by the retard nipple...
Gotcha, that makes total sense.
Yes, by vacuum intake I meant the vacuum nipple. And got it, that makes sense.DannyZ wrote: ↑Tue Mar 12, 2019 10:43 pm
For STEP 4: Synchronize carburetor mixtures
a) Should I unblock my retard intake on the left carb again during this step?
Not necessary. By "retard intake" (??) do you mean the vacuum nipple ? If you did have a leak-free retard diaphragm in good condition on your distributor, there would be no air flow at all, it is just vacuum. So, it would be exactly the same to the carburetor if you had the nipple blocked off or going to a healthy vacuum unit.
Sorry for not clarifying this better. The intake I am referring to is the EGR nipple, NOT THE BRAKE BOOSTER (Since mine is a 74 my brake booster does not have a nipple on it. Please see my photo for better clarification of my set up:DannyZ wrote: ↑Tue Mar 12, 2019 10:43 pm
b) My “Mixture Reference hose” on the right booster elbow plugs directly into the intake on my right carb
I do not hear any hissing OR get any changes in RPM with the finger ON/OFF tests
What "intake" are you referring to? If you have that hose coming from the right brake booster elbow to the EGR nipple on the carburetor, it is an air leak, it is breathing air from the right carburetor and that is screwing everything up. The "mixture reference" is coming from the brake booster nipple end. That is where the vacuum originates.
You have to fix this. The hose comes from the right brake booster elbow nipple, and it must either go to a functioning thermostatic valve in the right air horn, or be blocked off. Do you have a functioning thermostatic valve in the right air horn? Do you have another hose going from that valve to the air cleaner preheater valve nipple? It cannot allowed to breathe. Seriously, engine damage (#1 intake valve recession or a burned exhaust valve, for example) is right around the corner for you if you do not address this oversight.[/quote]For STEP 5: Set Central Idling Speed/Mixture
c) Should I still pull my Mixture Reference Hose (step 5b) from the right carb? When I do remove the hose and put a finger on the end the idle DOES NOT go down, or change for that matter.
Again, I apologize for not clarifying this better. I hope my photo helps to explain. I do have a functioning thermostatic valve in the right air horn (ie brake booster elbow???). And I do have another hose going from one of those two valves to the air cleaner preheater valve nipple. So am I ok and not in serious danger?
Yes, I have a great little hissing coming from the central idling circuit air intake.let us know if there is a good hiss coming from the central idling circuit air intake (take off the little central idling circuit air intake pipe/elbow from the left carburetor central idling circuit brass air intake.
I hope all this helps to better explain my set up. Does it sound ok despite using a distributor without a vacuum retard(If I hadn't just got it I would be much more inclined to replace it)? Or am I just showing you more problems...
If all of the above issues are ok, any suggestions for:
Q#1: synchronizing my carburetor mixtures (step#4) since I am not able to perform the Mixture reference hose "ON/OFF" test with my set up (I do have an EMPI synchronizer gauge that has made a huge difference)?
Q#2: how to get the central idle mixture screw set just right since my set up doesn't allow for "finger ON/Off" the mixture reference hose as detailed in step#5b.
Slowly but surely these carbs are making more and more sense. I remember asking a vw mechanic a while back if he would adjust my carbs and he just laughed at me and told me to replace them. I'm glad I didn't do it. Again, thanks for everything.