P0301 intermittent misfire and brittle bullets plugs

[thefisch]

Started getting the occasional misfire and CEL with code P0301 the other month. It wasn't happening too often - maybe every 100-200 miles - until recently. I was thinking it was time for new plugs or a coil swap, but then an inspection revealing that the silicone that holds in the bullet terminals in the ignition coil plug for cylinder 1 were completely disintegrated. Without the silicone to hold the terminals in the plugs, I expect they are getting loose leading to intermittent electrical connection.

I realize the long term solution is changing out the wiring harness but that does not appear available for my 98 S90. Any recommendations for repair? Splice in a pigtail?

Cylinder 1 coil plug with no silicone on wire

IMG_20230723_123557800.jpg (459.42 KiB) Viewed 1089 times

Bullet terminals loose inside plug

IMG_20230722_130104349.jpg (329.36 KiB) Viewed 1089 times

Cylinder 2 coil plug with cracking silicone for comparison

IMG_20230722_130120208_HDR.jpg (434.42 KiB) Viewed 1089 times

[bill740]

There is a connector with a short 6-8 inch wire attached to it. Do a e-bay motor search (ignition coil 960 volvo wire repair) and it will come up
You will have to cut the bad section and splice the new connector on.