Warm up the engine until the coolant temperature needle is in the middle, make sure the car is idling under 1k RPM
Open your hood and find and disconnect the TPS sensor. Your engine will rev up for a second then go back down to normal idling RPM's.
Get inside your car and rev up your engine to 3k RPM 2-3 times. This will lock the timing, so that you would get an accurate reading.
Connect the Timing Light Gun. You will need to connect it to your battery and the inductive pickup to the first cylinder's spark plug wire.
Find the crank pulley, there should be a pin right above it, find it.
Now you have an idea on where to point your Timing Gun.
Turn the timing gun on and watch for the timing marks on the crank. The pin above the crank pulley will show you your current timing.
In this picture my timing is at 16*-17* TDC
Here is the Crank Pulley and timing marks from FSM
To adjust your timing you will need to turn the distributor. Find your distributor and use the 12mm socket and ratchet to loosen the two bolts.
First bolt is towards the top:
Turning the Distributor towards the Firewall will advance your timing, while turning the Distributor towards the Front of the engine will retard the timing.
Turn the distributor in the desired direction, then check the timing. Make sure not to over do it! If you bump up your timing from 15* to 17*+ then you will need to run 91 Octane rating gas or better.
Here is my timing at 19*. I am running 93 Octane gas with this timing and so far no pinging or knocking.
Tighten the Distributor bolts and reconnect the TPS then shut off the car. Start the car back up and make sure everything is working fine.
You can make marks on your distributor for easier advancing/retarding of your timing.
These marks show the timing at 19*, 17*, and 15* on my car.