I have cleaned all my engines with a pressure washer.
Now I have had friends clean their HOT engines with coil packs on them NO distributor and it will sometimes kill a coil pack.
Only reason I can see for that to happen is the extreme temp change from a heat soaked engine.
Some of that foamy engine bright engine cleaner I think is diesel fuel in a can.
I have felt and smelled diesel fuel and other than the foam that stuff feels and smells like diesel.
Now I have had friends clean their HOT engines with coil packs on them NO distributor and it will sometimes kill a coil pack.
Only reason I can see for that to happen is the extreme temp change from a heat soaked engine.
Some of that foamy engine bright engine cleaner I think is diesel fuel in a can.
I have felt and smelled diesel fuel and other than the foam that stuff feels and smells like diesel.