Tested coils per your post and found #5 defective, replaced, and erased 1320 code. Driving for past 2 wks. and no problem, or light. Note: careful when purchasing coil. Take coil to store and compare the connection depth. Some non-oem coils connection lip is 1/4" deeper than original. It will connect, but not snap into place. This may cause connection to loosen.
Thanks again for your expert advise. It saved me a bundle!
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