What you just stated goes basically against the grain as to what whunter said, unless it takes channel lock pliers and definitely more than thumb pressure to activate the pump to keep the ten pounds consistent. What you stated about the low pressure function of the pump is what I thought. This was a known good injection pump and had worked for me prior to being installed. Do you know if you are supposed to be able to pump the auxiliary pump with your thumb? The pump mechanism just rides on the injection pump crankshaft, (correction) camshaft. Do you know how the pressure is built up in the injection pump or how the pressure relief valve (fuel line) functions? This line on the back side of the injection pump is one of the issues that I asked whunter about in my reply to him. My compression issue has nothing to do with solving this problem, in my opinion, and I will not even go there because that is not going to help me solve this fuel pressure issue BECAUSE it can easily lead back to "guessing", which I'm not going to do. I can tell you that 350 psi was the highest reading that I got. And I adhere to the philosophy that it is best to take a warm engine read to get a true picture in terms of engine compression and a cold engine numbers can be misleading. Does engine compression and fuel pump pressure work off of each other?


BenzDiesel