I bought a 1991 Volvo 240 from an auction The car would not crank after being jumped off. The odometer shows 147,990.

It acted as though that it was not getting gas so I replaced the fuel filter first.

After rewading online, I replaced the white module behind the Jetronic computer as recommended online.

After I got the car to start, white smoke was coming out of the tailpipe and coolant began to overflow out of the coolant reservoir within five minutes or less.

I checked the oil and the oil was milky looking. I checked the throttle body and it even appears that some of the oil/coolant mixture is getting into the throttle body.

The water pump has recently been replaced.

The car will not idle and has become more difficult to crank. I wonder if it is more than a blown head gasket.

Any ideas?

 

Yes, that sounds like the head gasket, especially if the coolant is getting into the exhaust.

 

Bookcase head gasket symptoms. You may be lucky and be able to save the motor--it all depends on how long the water has been sitting in the motor and if it got to the bearings. Unfortunately that's hard to figure out...