No its not been replaced but it doesn't leak coolant, even tried spraying starter fluid around it.
130k miles
happened about the same time the cat went out and i just replaced w/straight pipe
they fixed a previous misfire, haven't seen any improvement.. could a small exhaust leak cause a mis?

Fixed the original misfire with the ICM, after sparks wires and coil packs, fuel filter. Changed o2 sensor TPS, Camshaft position sensor. The gasket has not been replaced, but it doesn’t leak coolant, and I spray starter fluid around the whole area and it doesn’t change anything

Not losing any coolant, sprayed starter fluid around upper intake. No leak

What to do? Can someone dingos a misfire? 02 Bonneville 3800 series 2

So far replaced..

Spark plugs
Wires
Ignition control module
Coil pack (all 3)
Downstream o2 sensor
Fuel filter
MAF sensor
Throttle position sensor
Catalytic converter is not clogged, it’s been deleted replaced with straight ...