I have recently bought a GMC jimmy after driving it for 3 months with no problems it has now started to run rough and then stall after driving it for 15 minutes. If I try to accelerate when it is running rough it stalls on me. I have to nurse it through the revs until it is happy again. I cant see anything externally wrong with the carburetter, although the breather tube from the rocker cover was leaking a fluid which I belive was water into the top of the carby (suspect water since it leaves a milky residue like water and oil mixing). I have since disconnected it and pluged it, but it still runs bad. I am hoping there may be another solution apart from a cracked head or leaking main engine gasket. Anyone have any ideas?
My next step is to make sure the cylenders do not have oil / water / gunk in them but I think thats a long shot.
have the same problem?
Sunday, February 22nd, 2009 AT 9:42 PM