If you mean set ignition timing, generally not although with certain VWs you need a scan tool instead of a timing light. For any vehicle with adjustable ignition timing, there is a correct method for setting ignition timing which may require specific operating temperature and engine speed and possible unplugging something or pressing some buttons. If you just want to get ignition timing somewhere near reasonable on a carbureted engine with no electronic spark timing or advance, you can plug a vacuum gauge into manifold vacuum and turn the distributor until the vacuum reading is highest. A basic timing light can cost as little as $10 or so from an auto parts store and may also be available as a loaner tool. If you're talking about setting cam timing, a timing light is not used.
Because the timing is advanced.
Normally by turning the distributor, in conjunction with a strobe timing light
There are none. Ignition timing is not adjustable. Ignition timing and spark advance are handled by the engine controller module and the ignition control module, with inputs from various sensors. The engine controller is located by the passenger kick panel. The ignition controller is the thing the ciol pack mount on...it runs about $110 new. The ignition controller is often the cause of rough running, or idle problems as the spark advance function tends to crap out on this model of DIS ignition. Producing a constant error code, and therefore a constant check engine light.
YES! Any time you adjust the timing you should disconnect the vacuum advance.
If you are setting the timing with a timing light then it don't matter where the rotor is pointing. But if you are putting the Distributor in then yes. When it is in, It must be pointing to #1 on cap so vaccume advance don't hit the thermostat housing when you adjust the timing with a light.
The base ignition timing for a 1974 Chevy 454 engine is between 8 and 12 degrees below top dead center. A timing light is needed to accurate set ignition timing.
The question doesn't really make sense, but anyway... Timing mark is on the flywheel (open up the green cap), timing advance needs to be set at 6 degrees BTDC using a timing light. Hope i answered your non-question. lol
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.
it could be that the timing is a little off check the timing with a timing light, it could also be the ignition module which is very difficult to test on your own you can take the module to advance auto parts and they can test it for you!
how to set timing on ford 1987 f-100 302 without timing light
A dwell/ tachometer, and a timing light.