It don't backfire. In fact right now it is running perfectly. Two mechanics have not been able to find anything wrong... it goes to a 3rd mechanic on Tuesday.

I took it to a much closer mechanic that my uncle told me about that works on my uncles Volvo and BMW. He is said to be a very good mechanic.

He has been unable to find anything wrong either! He has let the car run, drove it, etc and it has not failed to start the first time. He put some seafoam in the tank and said it is running much smoother and said that some sort of temperature sensor for the fans looked like needed replaced and it was cheap and easy to replace, so he is replacing that. He said at 230K and original converters, it may be time to replace them. I am going to drive the car this weekend and see how it goes.

Like I said, I also have to take it to the other guy on the 2nd to check the converters and repair the check engine light and see if he can find anything out on it. What a mess.

Thanks!