I have a 2000 f250 5.4 auto 4wd. 171 and 174 codes. Cleaned then replaced maf sensor. Checked and rechecked for vacuum leaks. Then smoke tested. No leakes. Here is what the truck is doing. When it's 85 or above outside temp, the truck starts running lean until it won't run. I pull over turn the key off then immediately start back up. Runs fine for a few miles then does it again. But if it's cool or cold outside truck runs great no issues at all. Any advice would be appreciated.