According to Grammarly,
The past perfect tense is for talking about something that happened
before something else.
So of your three examples, (2) is the best example of proper usage for past perfect. The fast driving came before the police stopping him, so "drive" takes the past perfect tense.
For (1), this is technically grammatical but it conveys a different idea than (I think) you're trying to express. To be a good use of past perfect, there would need to be some other event in the picture which took place after the police stopped him. For example:
1a. He came to the party late. The police had stopped him because he drove too fast.
Another way to improve (1) and make it express the idea (I believe) you're getting at, would be to apply Past Continuous tense to "drive":
1b. The police had stopped him because he was driving too fast.
The same kind of issues apply to (3) -- confusion results from reversing the normal use of past perfect. And like (1), these problems could be corrected by relating the police stop to some other, later event -- and also by applying Past Continuous:
3a. He came to the party late. He was driving too fast, so the police had stopped him.