Thanks Glaws, you seem to be pretty confident in the relief valve, so the code pops up when it senses a low pressure, or high pressure, or does it pop up whenever it is out off range? What about connections or wiring like what Mursal was saying? I have never replaced it myself, and it looks like I will need to remove some wiring harness and some fuel lines. It will be next week when I get to it. Ill be excited if that turns out to be the problem. Ill take some choke and carb cleaner on the old one. Here is the picture of the old one.