So new Volvos have wire loom on the spark plug wires now, huh? When I changed my knock sensors recently, one of the things you have to do is remove the fuel injector rail. The injector wire harness is covered with plastic wire loom, which also was crumbling. I temp fixed it with some black electrical tape, but later found some replacement loom at a local electronics store for about .50 a foot. I purchased about 3 feet and replaced the wire harness loom. No problem...