This will sound a bit stupid, but change BOTH of the fuel filters. The inline plastic one, and the one that looks like an oil filter. You will also need to purge the air out of the system. There is a little hand pump on the side of the injection pump to do this with. It looks like a black plastic knob that is about 1 1/2" round. Unscrew this a bit, and pull up on it. It's that priming pump. I don't remember totally off hand how to do it, so you might refer to a book. I was driving down the highway one day, and my car was going fine, next thing I knew, I couldn't even go 55. I pulled off at a rest stop, and I couldn't get it to start. I pulled off the plastic inline filter, and blew the junk out of it. Put it back in, purged the air, and was back on the road in no time. Keep an extra with you.