I recently returned from my first trip after installing the Cat primer fuel pump water separater on my Cat C-9 powered '06 Monterey. When I bought the Monterey two years ago, I was disappointed with its tendency to surge at low rpms. After researching the issue on various on-line forums, I found the description of the problem (and solution) here on the BAC forum. I ordered all the parts on the parts list (expensive, but if it worked, it would be worth it). I did not know if I had a fuel delivery problem, or an air intrusion problem because of the aged plastic connections on the fuel lines. I decided I did not care which problem it was, I just wanted it fixed. So, I ordered extra metal compression fittings to replace all the aged plastic ones and did it all at one time. The results were very satisfying. It now accelerates smoothly at all rpms. So, I am a happy camper (at least with this issue). A sincere thank you to Dave Atherton and all others involved in providing a solution to this problem.
Richard