I put a another tbi 350 engine in, was running great for two weeks now starts surging

[Tyree]

I decided to swap out egr valve with another one I had laying around. I ran the engine again and it ran much better. I will have to test drive and keep doing more logs. I revved this one up a few times during log. Does anybody know what normal idle rpm's are for a 1990 5.7? I attached the log so if anybody can watch it and let me know if they see anything strange. But it seemed to be running better.

[damanx]

I always forget the egr valve. I'm not running one.