1991 Buick Park Avenue no spark

Wiggle battery cable a little. There's two of them. Wiggle the one thats puts power on relay center. If the other one was making bad connection the starter wouldn't work and you would come to this spot without a tip. Let the engine run and see if it cuts off when you move the cable. If yes-you found it for today. Also wiggle wires at ignition module. This is another problem area. Hopes this helps.-Yep
Ignition System 1. Disconnect tachometer wire at distributor TACH terminal (if equipped). A shorted tachometer or tachometer circuit will not allow vehicle to start. 2. Check for battery voltage at BAT terminal at distributor with ignition on. Repair as necessary. 3. Connect ST-125 spark tester to end of one plug wire and crank engine. If spark occurs, check fuel delivery. 4. If spark does not occur, disconnect 4-wire EST connector at distributor. If spark now occurs, replace pick-up coil in distributor. 5. If spark does not occur, reconnect EST connector and check voltage at TACH terminal at distributor with ignition on. 6. If voltage is less than one volt, repair faulty coil connection or replace faulty coil. If voltage is 1-10 volts, replace ignition module and recheck for spark. If spark still does not occur, replace ignition coil. 7. If voltage reading at TACH terminal of distributor is greater than 10 volts, remove and invert distributor cap with wires connected. Fabricate an HEI coil spark tester by trimming a spark plug boot and connecting it to ST-125 spark tester. See Fig. 1 . Crank engine. 8. If spark occurs, check cap for cracks, water or other defects. Check pick-up coil connector and ignition coil lead wire colors. Ignition coil with Yellow and Red wires should be used with a Yellow pick-up coil connector. Ignition coil with White and Red wires should be used with a Clear or Black pick-up coil connector. 9. If spark does not occur, turn ignition off and disconnect pick-up coil leads from module. Turn ignition on. With voltmeter connected to distributor TACH terminal and fabricated coil spark tester connected, momentarily touch test light, connected to a remote voltage source (1.5-8.0 volts), to ignition module terminal "P". 10. If voltage at TACH terminal does not drop, check ignition module ground and for open in wires from ignition coil to module. If all is okay, replace ignition module. 11. If voltage at TACH terminal does drop, check for spark at spark tester as test light is removed from terminal "P". If spark occurs, check pick-up coil connections and check for 500-1500 ohms resistance at pick-up coil leads. Repair as necessary. 12. If spark does not occur, test ignition module with module tester. If module tests okay, check ignition coil wire. If module tester is not available, replace ignition coil and again touch terminal "P." If spark occurs, system is okay. If spark does not occur, reinstall original ignition coil and replace ignition module.

If you arent real good at testing, take the coil and ignition module to autozone they can test em for you.

JT, if he hasnt answered you, it's probably fixed. Good work.