35 BTDC 35 BTDC
Connect timing light to #1 spark plug and battery Remove and plug vacuum line to vacuum advance unit on distributor Mark appropriate timing mark on crankshaft and stationary reference Loosen distributor cap slightly Start vehicle and aim timing light at timing marks Rotate distributor to align marks Tighten distributor cap when marks are aligned Reconnect vacuum line
It won't. That vacuum line tells the distributor When to advance the timing. There isn't enough vacuum loss to stall an engine.
With the engine warmed up and at idle, disconnect the vacuum line to the vacuum advance.Hook up your timing light to number one cylinder. Slightly loosen the distributor. The timing should be about 4 degrees. Move the distributor until the pointer is at 4 degrees. Tighten the distributor and reinstall the vacuum hose.
Remove the vacuum hose at the distributor and plug it temporarily. Attach timing light and turn distributor as needed to set to factory specs or 8 degrees BTDC. Reattach vacuum line.
hook up a timing light to cylinder 1 spark plug wire. disconnect vacuum advance hose on distributor. loosen distributor hold down bolt slightly. start engine. point timing light at the balancer/pulley on the front of the engine. the flashing will make it look like the line marked on it is standing still. turn the distributor slightly until you line up the mark with the correct notches on the timing indicator on the block. tighten distributor hold down. hook up vacuum advance. when you plug the vacuum advance back in you can watch the timing advance with the light to verify that it is working. remove the timing light.The above answer is correct for distributor equipped cars with balancer timing marks using cylinder #1 refrence. This virtually all early north American built cars.All other cars have very different procedure's. Any request for this info must have year make and model to get a correct answer
Probably. It might be hard to set the timing to the correct specs if the vacuum canister gets in the way.
Install timing light on #1 cylinder Remove and plug vacuum advance line from distributor Highlight timing marks crankshaft and stationary Loosen distributor hold down Start vehicle and move distributor to align marks
Manifold vacuum usually. There may be some instances where someone reworked a distributor to arrive at a specific timing curve under load using ported vacuum with the vacuum advance, but this would be rare as most people would re-curve their distributor by changing advance weights and springs and would limit the advance built into a distributor so they could use more initial timing without having the total timing go over 36-40 degrees when the engine is revved up and all advance is in.
Put your timing light on the number one spark plug wire and then remove the vacuum advance hose, loosen the distributor bolt and with the engine idling move the dist. unti, you get the timing mark on the crank to come to the correct notch on the timing guage.
I really depends on what distributor you have on the engine. It could be a mechanical advance distributor or a vacuum advance distributor (stock). Google "the Somba" Volkswagen forum and all will be explained.
pull and plug vacuum line to spark computer, adjust timing
Connect timing light in series with No. 1 spark plug Connect timing light to battery Remove vacuum line to vacuum advance unit on distributor Mark timing marks on crankshaft and stationary Loosed distribtor hold down slightly Start vehicle and move distributor slight to align timing marks