I have the same thing happening with my car right now and its killing me in points too.

My car seems to work good when its cool out and when the heat and humidity go up it will loose .05 or more from one round to the next.

Been blaming it on being too rich so after it did it to me first round I took out 5 in jet and it did it to me again yesterday first round.

I guess if it keeps up we will just have to bag a tenth and at least have a chance at the finish line......



Very frustrating...