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tonight after rush hour when less people are out, find a quiet lit parking lot to drive your car to. keep it running and get out of the car, close the door to stop the binging, and put your ear as close to the main fuel pump as you can if it is whining or hissing then your fuel pump is working to hard (whining) and hissing my be the fuel pump check valve. if it is the fuel pump, your intank pump probobly needs replacing, hence the main pump working too hard and crying about it(my 88 244 is doing that right now).
I don't know how to test an ignition coil. you may want to unhook it and gently shake it to be sure there is some liquid in their, if it is dried up it may be on its way out.
Best,
Chuck
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