Find out the timing marks. These marks are usually behind the serpentine and the crankshaft pulley. First clean the marks as you will easily see them. Careful to work on timing marks which have pumps on the engine. By engaging the starter momentarily, the engine will slowly start. Now connect to the timing light with the main power supply (batteries). The number one ignition wire which usually located on far left side of the cylinder, will allow reaching the normal operating temperature.
Start your engine
After connecting the timing light to main power supply, start your engine and see whether the temperature remains the same or starts to get high. Let the engine idle so that you can check the level of the temperature.
Judging cooling temperature
Carefully examine the cooling temperature of the engine. It will give you further reach to attach the timing wire to the ignition wire. It is a difficult process but with right tools and understanding of engine mechanics, you can easily adjust the timing on a Plymouth Voyager. The cooling temperature sensor will also guide you to see where the timing marks are more visible.
Turning the engine off
Turn your engine off after adjusting the timing. Wait for few minutes before changing the distributor in the middle line on the timing light.
Be careful piercing ignition
Take great care while piercing the ignition. It may misfire or crossfire if the required does not fit accurately. You also need to take great care when you force changes upon the engine which will ruin it because the manufacturer has specified engines with unique settings. Make sure that you take your time so that you can get this part done right. It might take some practice but you will be able to get this task done eventually.