I would check for vaccum leaks especially at the breather hoses-I had one a bit loose and the car would not start at all. I read that one must always check for air leaks and in my case that was perhaps the best advice i have received. A vacuum leak does not have to have a raised idle if there is too much air. Consider what happens when the car sucks in too much air and not able to compensate by adding fuel...It stalls.