2007 case 430 after setting even just a few minutes starts as if it has air in fuel lines runs on one or two cylinders then after a minute or two clears up then runs great. The lift fuel pump on the engine block does not pump up hard with the manual purging pump. Im not sure if it is supposed to. Someone said there is a temperature sensor controlled solenoid on the injector pump that causes this type of problem. Any suggestions.
Can't help your problem, but assuming this is a typical diaphragm pump with the lever to manually operate it, then it shouldn't pump up hard. When you move that lever you're pulling the diaphragm back against spring pressure, release it and the spring pumps the fuel out, until the fuel pressure builds and holds the diaphragm back so there is no pressure on the lever because the spring is held back also (or there is pressure on half the stroke because the spring only pushed some of the fuel out). There is more pressure on the lever when the inlet is plugged and the lever/diaphragm is pulling against a vacuum. You can tell if the pump is pumping air and not full of fuel because it will have normal pressure pushing the lever, but it will spring back with the same pressure, no fuel to dampen the spring pressure.
not sure if you got my post delmer but thanks for the info about the pump what you described about the pump having pressure on half the stroke is exactly what i have sounds like that is normal so i will look for my problem elsewhere in the system thanks
are there any problems with the plastic fuel line connectors not sealing good?
No, what did I miss? I've never had any problem with plastic fuel lines, BUT you never know. My post was just in relation to diaphragm priming pumps, I don't know squat about Case, but it would have to be a real bad air leak to cause problems after being off for a few minutes and then take a full minute to clear up. You could check the fuel return or bleeder for air after it's sat overnight.