I have a 1997 Isuzu Hombre that recently seems underpowered.
Also, I hear a “puttering” sound under the hood while driving.
And, most importantly, giant clouds of white smoke come out of exhaust occasionally. It is not constant.
From my research, this could maybe be a blown head gasket, or, coolant is getting into the combustion chamber somehow.
I don’t want to take it apart to discover which it is. Is there any way to diagnose without taking everything apart?