My 1988 Mitsubishi Mighty Max 2.0L, Auto, 183,500 miles. Just had the head gasket replaced in 2008 and rebuilt the carb in 2007. Now I notice in the mornings first start (cold engine) it runs real rough and hesitates for about 30 to 45 seconds then it seems to clear up and runs good. It only does this once in a while (not everyday). The last time I had it smogged in March 2010 it BARELY passed on all readings (HC, CO, NO). Wondering what this could be. Any ideas? Please help me....... I'm thinking maybe the EGR valve?

I have one with 282K on it and have seen it all. Internal to the carb there is a choke valve, its looks like a plunger, beleive it or not they go bad and caused my truck to run horrible, loading up and running extremely rich. I have a mechanic replace mine and it fixed it right up. Darn little thing was like $$120.00 and its nothing to it....but it made the world of difference in the performance. Not I am getting some steam in the morning that smells of antifreeze.....head gasket time....not bad though..it made it to 282K! I have one with 282K on it and have seen it all. Internal to the carb there is a choke valve, its looks like a plunger, beleive it or not they go bad and caused my truck to run horrible, loading up and running extremely rich. I have a mechanic replace mine and it fixed it right up. Darn little thing was like $$120.00 and its nothing to it....but it made the world of difference in the performance. Not I am getting some steam in the morning that smells of antifreeze.....head gasket time....not bad though..it made it to 282K!

mine is at 378400 still going strong mine is at 378400 still going strong