An advance timing light has a dial on the back of it so that you can set it to the correct timing setting, I.E. 4 degrees before TDC. If your timing index on the motor is unreadable due to rust or is just missing, this still allows you to set the timing.
Hook the red lead to the positive battery cable and the black lead to a ground. Determine which cylinder is your #1 cylinder and then clip the inductive coil clip around that wire. Loosen the hold down bolt on your distributor so that you can turn the distributor , with some effort, and start the motor and pull the trigger. The light will tell you when it is at the correct setting. tighten the hold down bolt and re-check as the distributor can move sometimes when tightening the hold down bolt.
Always either pull the vacuum line and plug it or unplug the electronic timing advance wire ( which ever your vehicle has) BEFORE trying to set the timing. Reconnect after setting the timing.
There should be a label under the hood that will describe what the wire looks like and where it is located.
Because the timing is advanced.
Normally by turning the distributor, in conjunction with a strobe timing light
YES! Any time you adjust the timing you should disconnect the vacuum advance.
Petrol engineYou really need a strobe timing light to set the timingThe timing marks are visable through an appature in the bellhousingTo advance the timing you need to rotate the distributor bodyclockwise.
Step one: Head down to Harbor Freight or Walmart and buy a timing light for $20...
You will need a timing light with the timing advance option so you can adjust and monitor your changes. Vacuum advance limiters along with mechanical advance timing weights and spring kits are available from after market suppliers.
Use a timing light with vacuum advance disconnected set base timing to 6 degrees
8 to 9 degrees with a timing light with vacuum advance hooked up,
loosten distributer bolt, point the timin light at the timing grid on the harmonic balancer and turn the distributer to either advance or retard the timing.
Disconnect and plug the vacuum line and time the engine. Reconnet the vaccum and recheck the timing which should be advanced.
NO. A timing light will not work on that engine. You must have an obdII engine scanner to set the timing on that year.
Loosen the distributor, bring the #1 piston to Top Dead Center (TDC), connect the timing light, and rotate the distributor clockwise or counterclockwise to advance or retard the timing until the timing light indicates that it's set properly.