I have a fully rebuilt d310, head , injectors and pump. The first fifty engine starts were perfect, but now when I start it up and release the fuel primer (shut off pull handle) the engine sputters and dies. If I start it up and feather the primer like a choke on a gas engine to keep it running for about 2-3 minutes and then release it, the engine idles and runs fine. The exterior temperature has been 50 and below since I’ve had the issue, but I’m not sure if it’s temperature related.
Is this normal, or do I need to adjust something? Any help would be appreciated.
I have about 8