A distributor cap on a vehicle might be bad if the car is shaking more than normal. Other signs include stalling after the car has been running, squealing and rpm's running high.
The distributor cap is important to the performance of the car's engine. Some symptoms of a bad distributor cap are stalling, backfiring, shaking, and a high pitched squealing noise.
Bad coil? Bad distributor cap? Bad distributor rotor?
Bad distributor Bad coil Bad distributor cap Bad rotor
Bad coil? Bad distributor rotor? Bad distributor cap?
I don't know what your specific problem is, but there is no distributor cap.
Replace the screws.
Bad ignition rotor? Bad distributor cap? Bad ignition wires?
Number 1 plug position will be listed on the cap. Now if you know the firing order, and you know the direction the distributor is turning, you then will know plug positions as connected to the distributor cap.
If you know that there is spark at the distributor cap then I would think it would be bad spark plug leads.
Cracked distributor cap or bad plug wires
Bad coil? Bad rotor? Bad distributor cap? Bad Ballast resistor?
Bad coil? Bad coil wire?