Hello. I have 99 Quest with a dead speedo. It did the bouncing around thing, and now is totally dead. The check engine light is on and the o/d light flashes on start-up. I have seen the same problem posted here and other forums, however I have not come across what exactly the problem is and what the solution may be. This is what I know for sure:

- it is not the cluster (I replaced it)
- the obdII codes given are for speed sensor and knock sensor
- with equipment hooked up to the computer it (the equipment) will tell me the speed the van is going. Just wondering if anyone has found solution to problem. Thanks