Where do all the vacuum lines go on a Quadrajet carburetor?

Where do all the vacuum lines go on a Quadrajet carburetor?

the T: right goes to the Brake booster. left (steel line) goes to kickdown. rear facing is not connected just blocked. pcv goes from DS valve cover to port under gas filter.

What happens if vacuum advance doesn’t work?

Eventually the deterioration will reach the point that the vacuum advance no longer adjusts the timing, causing the vehicle to hesitate when the engine attempts to move the vehicle’s weight. In addition to this lack of power, a vacuum leak can also cause the engine to idle roughly or even stall.

How do you know if your vacuum advance is bad?

Back to your original question…”What are some signs that my vacuum advance is bad?” You will have poor gas mileage and poor throttle response. As DrMaserati has explained, vaccum advance disappears at high RPM’s… this is where the mechanical weights come into play. Ideally you want around 35 degrees total timing.

Should I use vacuum advance?

Under a light load and part throttle conditions, timing can be advanced. This improves throttle response and makes the engine more efficient. It also helps the engine run cooler. The vacuum advance provides this benefit BEFORE the Mechanical Advance provides Total Timing.

What does the vacuum advance do?

Vacuum advance works by using a manifold vacuum source to advance the timing at low to mid engine load conditions by rotating the position sensor (contact points, hall effect or optical sensor, reluctor stator, etc.) mounting plate in the distributor with respect to the distributor shaft.

When should vacuum advance start?

If your engine idles at 10 inches Hg or less, you can start the tuning process by setting the initial timing to at least 15 degrees BTDC. If your car is equipped with an automatic transmission, placing it in gear may pull the manifold vacuum down even further.

Does vacuum advance affect idle?

Plugging your vacuum advance into a direct source will allow it to engage at idle, which is good for a number of reasons. Much like cruise conditions, engines run leaner at idle than they do under load. Again, this means the mixture burns slower and needs an earlier spark to optimize the burn.

How does timing affect horsepower?

Ignition timing advancing means that the spark plugs are firing earlier in the compression stroke, farther from TDC. The major benefit to advancing the timing of a vehicle’s ignition is increasing the horsepower of an engine. Advancing the ignition timing helps raise the high-end power while reducing the low end.