'89 pathfinder won't start

has v6, was running fine, then after sitting for a couple of weeks, won't start, engine turns over, after several attempts to start could smell a slight gas odor, so i figured it wasn't getting spark,checked spark between coil wire and distributor and that was good,but doesn't seem to be getting spark to the plugs,pulled cap and checked for cracks,cleaned off carbon tracks and cleaned up the tips a little,put it back, still won't start, wires are in good shape, so i pulled plugs,some were wet with gas, dried them out, still nothing. if i'm getting spark to the cap does this mean the ignition module in the distibutor is ok? while cranking the engine it puffs or "coughs" from the intake,and the engine seems to"bind" a little at times.could it have jumped time,and would this cause it not to send spark to the plugs at the right time. or could it be as simple as a new cap.I know a new cap is not expensive,just don't want to replace anything it doesn't need. was going to put it up for sale when this happened,just want to get it running so i can sell it. has 180,000 miles, 5 speed, 4 wheel drive, two door. thanks,mark