Been chasing this ignition troubleshooting problem for a while, a misfire on cyl. #3 which was finally isolated to intermittent continuity in the #3 coil receptacle housing. (Eliminated possibilities of low compression, faulty coil, faulty spark plug). See:
https://www.fcpeuro.com/products/volvo-plug-housing-9456341
https://www.fcpeuro.com/products/volvo-ignition-coil-connector-housing-genuine-volvo-9494800#fitment
Does anyone know what the proper terminal extraction tool is, so I can transfer a new receptacle housing to the existing #3 ignition wire harness? (Four separate wires/terminals connect to the receptacle housing).
Current status: every few thousand miles #3 will misfire again. After disconnecting the receptacle housing from the coil, blasting the connectors with electrical cleaner spray and filling coil and contact cavities with dielectric grease, continuity is reestablished for a while and misfire goes away. My diagnosis is that the terminals are worn/corroded inside the receptacle housing - it's time for a new one (links above).
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