missing

You can check the vacuum canister by starting the car with the vacumm canister onnected. Check timing, then pull vacuum line and see if anything changes. Timing should not move and engine should not change...means vacuum canister correctly hooked up to carb and that part is okay. Now rev engine up to about 1500 and do same thing. Timing should fall back as vacuum is taken of of distributor and engine rpms should change as you now have a vacuuum leak. If that happens good. If the timing does not fall back as the vacuum is released, the canister is bad or the mechanism is stuck in the distributor. (If you have a hand vacuum pump you can test the canister with that and see if the mechanism moves and if it holds vacuum..problem is most people don't have a hand vacuum pump laying around.)