I have been having a random issue with my 97 stalling after it has been sitting for a while. It is very intermittent. If I drive for ten minutes or so and shut it off for 10 to 20 minutes it will start and when I put it in gear it will stumble and die. Sometimes it will do it twice then start and run fine. I have replaced the fuel pump and I never get a engine light. I have a scanner with me and no codes when it stalls. I was hoping someone may have some advice on this issue.

 

Clean the IACV, and the MAF (do that only when cold, only with spray made for that task).