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Re: fuel priming issues
Inside the fuel pump and above the fuel heater is a filter screen. That could be plugged. If there are any loose connections the system can draw air and loose prime. Any and all rubber line that's old should be replaced. Deteriated rubber lines can suck air before a leak will show up. These are the usual cause of hard starts in the morning..
Try unhooking the from the fump to the filter and see if tou can push fuel that way to verify the pump is working. Alot of times I fill the filer up and install but leave it a 1/4 turn loose. Then prime. Once fuel leaks out I will tighten the filter. That is usually enough to get it to run. Usually that will be rough until the injectors are bled. Once everything is running you usually don't have to replied the injectors after a filter swap.
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