Older cars often suffer more than one cause. Becare not to jump to a wrong conclusion. :(
My guess is that it ran rough prior to the converter being replaced. Typically the top reasons a converter is replaced is because it plugged or damaged from excessive fuel entering the converter, the other reason is it is leaking.-Need to know why you replaced it. :
Typically blue smoke means burning oil.
Losing coolant may be internal or external. Do you check it at the same time. When cold or hot etc? :
Start with a pressure test of the system and verify is isn't leaking externally. Are you using a 50/50 mix?
Recheck spark plug gap and for tightness of wires. Also check the conditions of the plugs, anything abnormal in appearance?- Green tint, crusty build up? How were the old ones?
I wouldn't jump into pulling the heads right away, it may not reveal anything. Although it may be the source. Regardless it is an expensive guess.
Saturday, December 23rd, 2006 AT 9:00 PM