It's been a while, but, yes, a severely blown modulator will cause white smoke
of the tail pipe and, curiously, not much difference in transmission
line is pulled off the trans won't shift?. The overheating at idle may or may
connected. If the vehicle is equipped with a fan clutch, it's likely bad if
Model and year would help greatly. Is this a stock car, or a 460 in something
This is a tuff one. It could be running to lean. The white smoke has me
stumped. Only way on the white smoke is a cracked cylinder or blown head
gasket this will also cause it to over heat (putting pressure on the coolant
system). One way to check this is warm (not hot) engine and while running
remove radiator cap. If the coolant come out (look for water with air
pressure behind it) you have cracked cylinder or blown head gasket. It don't
take much coolant to make white smoke. Over heating will foul plugs too.
Hey Doc, I've seen your posts and figured you for an old timer. ATF will burn
too. May not be his problem, but I remember seeing (owning) Fords with with
smoke pouring out of the tailpipe(s) caused by a bad Trans Modulator. I used to
this even before the coolant level on late 60s and early 70's Fords. I bought
with "bad head gaskets" at "reduced" prices at used car lots due to blown trans
modulator valves. That ATF would sure clean the intake tract on an engine.
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