We recently purchased a 1999 KW W900L with a series 60 detroit in it. It has been sitting for about 3 years. Here is my question,,,,, So we got it home and put it in the shop. About every other time we start it it has quite a bit of white smoke coming out the stacks. It is the type of smoke that your eyes start burning within a minute or so. (Shop is fairly small 40'x40'). What has me baffled is that it doesn't do it all the time and it doesn't seem to be temperature related. (outside temperature or engine temperature). The engine sounds good. No obvious knocks or misfiring noises. Any ideas on what might be causing the excessive smoke??? Thanks in advance.