01 S40 Cyl #4 Misfire, tried everything!
#1
05-22-2011, 06:37 PM
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01 S40 Cyl #4 Misfire, tried everything!
Already swapped plugs, coils, and injectors with other cylinders. also ran compression on all cylinders, resistance on both coils and all injectors, everything is consistent and within spec. #4 continues to drop a misfire CEL. any ideas? the misfire can be felt throughout the rpm range, including idle
Last edited by NFrank89; 05-22-2011 at 06:39 PM.
#2
05-23-2011, 06:54 AM
Replace the coils.
Like you, I tested coil resistance, ohmed the wires, replaced the plugs, even pulled the fuel injectors and cleaned them with a home made rig. All checked good. I then broke down and replaced the coils and all was well.
Autozone had coils in stock for $44 each (at the time). I thought they would be el-cheapo chinese knock-offs but was pleasantly surprised when an OEM Volvo coil came out of the Duralast box.
Like you, I tested coil resistance, ohmed the wires, replaced the plugs, even pulled the fuel injectors and cleaned them with a home made rig. All checked good. I then broke down and replaced the coils and all was well.
Autozone had coils in stock for $44 each (at the time). I thought they would be el-cheapo chinese knock-offs but was pleasantly surprised when an OEM Volvo coil came out of the Duralast box.
#3
05-23-2011, 03:10 PM
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Ethan Morrisson
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