I have an autolite 4100 carburetor on a 66 mustang with a 289 engine. I am running the stock intake manifold. When driving the car I feel no response from the secondaries when pressing the gas pedal to the floor. I placed an indicator on the secondary linkage and it never moved when driving the car- pedal to the floor.I have checked the following.
1. Removed the carburetor top, moved the secondary linkage and placed a finger over the hole to the secondary diaphragm. It held vacuum,.
2. With carburetor assembled applied vacuum to the pipe running to the secondaries. The secondary linkage and plates moved.
3. Checked the secondary stop adjustment.
4. Verified that the choke is opening fully
5. Verified the secondary linkage moved freely when the engine was fully warmed up.
6. When I moved the secondary linkage with the throttle open and the engine warmed up (engine off) it appeared to put gas in the engine indicated by a puff of evaporating gasoline.
7. Verified that the gas pedal fully moved the primary throttle plates.
Any ideas of why they are not working would be wonderful. Thanks everyone.
1. Removed the carburetor top, moved the secondary linkage and placed a finger over the hole to the secondary diaphragm. It held vacuum,.
2. With carburetor assembled applied vacuum to the pipe running to the secondaries. The secondary linkage and plates moved.
3. Checked the secondary stop adjustment.
4. Verified that the choke is opening fully
5. Verified the secondary linkage moved freely when the engine was fully warmed up.
6. When I moved the secondary linkage with the throttle open and the engine warmed up (engine off) it appeared to put gas in the engine indicated by a puff of evaporating gasoline.
7. Verified that the gas pedal fully moved the primary throttle plates.
Any ideas of why they are not working would be wonderful. Thanks everyone.