To double check it's a fuel issue use wd-40 spray in air intake and see if it starts. The other thing to check is lift pump. Injection pump would be last thing to be the issue. Do not use starting fluid use wd-40. On any diesel engine.
It is the pump and the pumps are about 1000 dollars. They are not that hard to install. IT should cost about 1500 total.
SOURCE: If I have a small leak on one of the injection
check each injector in turn ( crack it open where the fuel pipe attaches to the injector ) be very carefull you dont get injected ( VERY BAD ) and use a rag to ensure the fuel spray dosent go everywhere , listen for the engine note changing, if it does on each pipe/injector nut this indicates your injectors are ok ,the fuel system maybe drawing air/loosing pressure so then replace your fuel pipe olives which cost pennys and the copper washers on the various banjo bolts /unions
SOURCE: I have a John Deere 2020 diesel. I can't get the fuel pump off
You need to remove the nut under the cover in front of the pump and then borrow a tool from a j.d dealership to pull the coupler off the pump,you may need the dealer to do this because they have a no lend pollicy for their special tools.Hope this helps.
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