So I was reading about the TBI system in my book and I found this.

Now, mine is an 89 model but I could see them using the throttle body on more than one year. But it says just rough idle, not fluctuating idle. But it does have trouble starting once it's hot and stalls out. Have to give it a min before it will start again. So it does seem somewhat right. Has anyone had one of these 2409 or earlier throttle bodies? Mine is stamped with 0069. So it is 2409 or earlier as long as that is the right stamp I'm looking at.