Look on the distributor cap very carefully. It should be marked. If no go, bring #1 to 0 deg TDC and the rotor will be pointing at it.
I would try distibutor cap and rotor.
the ignition module is under the distibutor cap
There is no distributor cap on a Pontiac sunfire, only a coil pack. coil pack is located on the back of the engine.
start by taking the distibutor cap off, the bring the #1 cylinder up to tdc (top dead center) then see were the rotor is pionting. then remove the hold down plate & remove the distibutor. next drop the new distibutor in making sure you put the rotor-gear in the same place the old rotor was. tighten the plate bak down then start the car if the car does not start or it has a miss then turn the distibutor till the motor either starts or the miss is gone. then you will need to time it with a timing light, if you don't have one take it to a shop and they will tune it for you for less than nothing.
1987 Pontiac Fiero2.8 liter V-6
On your Ford 4.9 liter / 300 cubic inch straight six cylinder engine : 1 - 5 - 3 - 6 - 2 - 4 The distributor rotor turns CLOCKWISE The marked # 1 position on the distributor cap faces AWAY from the engine
1-8-4-3-6-5-7-2 clockwise on distributor cap.
Hanes manual sold at oreilly auto parts for about $16
1-8-4-3-6-5-7-2
4.7L does not have a distributor. 5.2L and 5.9L the distributor is on the rear of the engine.
its probly the condencer
check ur distibutor cap and rotor bug pull a spark plug see if its getting fire then make sure ur getting fuel to the carb