2 Questions for you.
I have a 1995 volvo 960 that i just want to drive until it wont drive anymore. just love the feel and comfort. I am having an issue that i can't seem to correct that the engine is misfiring and its causing a lot of issues.

1: Camshaft sensor going bad, what are the symptoms I have a code that points to the Camshaft sensor as faulty, however since the engine is misfiring i am wondering if that would cause the code since the engine is not firing correctly. Any thoughts on this ?

2: I have had engine misfiring issues for a while, first i replaced the coils and it seemed to fix it, then it started up again, so i went to where the coil and wireing harness connect and i pulled them apart and replaced the connections, and then feed the wire back in and reconnected them to the coil.
Initially it again ran fine , misfire was gone. Then i put on the A/C recently and the misfire is back again. I'm now being told its the wiring harness, which i am having issues with, how could it run fine and then not run fine because the compressor kicked on, why would that be the wiring harness ? And why did replacing the coils fix this temporarily ? Again any thoughts are appreciated. My next step is to rewire the harness and i am not looking forward to that.