1978comet1
New User
We have a diesel 450C Deere that all of a sudden won't stay running. It's full of good clean fuel, we blew out all the lines which didn't help. Replaced the filter which at first we thought took care of it but it didn't. Once the filter filled up it ran for about 3 minutes then died again. So, we put a new lift pump on which didn't help. We have cracked the injector lines and didn't get any air form any one of the 4. This did cause it to run very rough. Took return line off at the injector pump, there is very, very little to no return fuel. It starts and run for maybe 2 to 3 seconds and dies but, it'll restart just as soon as it dies and run another 2 to 3 seconds and die. Now for the even odder thing. If the filter is took off or if the injector supply line is took off and put back on it'll start and run for 10 to 15 seconds. When it dies it's like the fuel is shut off not like it's running out of fuel. We are at a loss, can anyone help?