Compression Ignition Addict
Join Date: Feb 2013
Location: Moses lake, wa
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Im sure That it works when It is running, but that engine was designed to have a lift pump in full working order, and to aid it on start up with a e pump will not fix anything. Ask anybody, when a 7.3 idi is in correct working order, they will fire almost instantly with a mechanical pump. I would just replace it and be done with it. Remember, International recommended that the IP and injectors be replaced every 100k miles, and the lift pump wears out too.
Now for the air in fuel, I do not know if there is a check valve or not but I could look into it,however right now all of our IDIs are starting great. I would go ahead and replace the return lines, can not at all hurt, and just 75 $.
Whatever you do, do not get an airtex mech pump, as most of the time they are bad out of the box.
Axel --> 16yo
96 CCLB srw. built E4OD, Diy E-fuel, Autometer gauges
4:10 lsd, Toyo M55 on stock steelies
Future plans include diy Traction bars, and zf5 swap.