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Originally Posted by boneheaddoctor
Just removing the hardlines should not be an issue that introduces air into the IP.......UNLESS they have leaking delivery valve seals and this will allow air to enter and fuel to drain off back towards the tank via siphon action. Cracking the lines in this case allows the system to purge air with little resistance. This may explain what some people see.
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This is rather interesting. So, if the delivery valve seals are not doing the job, the IP can't overcome the air in the hard lines?? Allowing the fuel to fill the hard lines by cracking them will overcome this issue??
What other symptoms are present with marginal delivery valve seals on the 617? The inability of starting the engine without cracking the injector lines should be a clue to other symptoms..........or not??