I've had an on going problem with my '88 7.3 E-350. It will start right up and run for about 30 sec and then die. If I let it set for about 5 minutes and then crank it for a while it will start up and run fine. It only has the problem when cold and has been setting overnight. I had a leak in my lift pump and thought the fuel was leaking out of the pump and lines causing the problem. I replaced the lift pump ( a whole other story) yet the problem persists. It's just a minor annoyance since I don't use my van too often and make sure I allow myself time to start it, but I'd like to fix it. Any ideas?

 

Sounds like air intrusion. Might want to consider installing new return lines and caps. Not that expensive on ebay. The old ones may look good but still be allowing air in.

 

Check your fuel filter header for wet spots on top........ If the return lines are grey painted they are OEM...... same with the injectors. An electical lift pump will solve the problem as it would re prime the fuel system key on.

You state you had trouble with the installation of the lift pump is it OK now.......

Take the filter header Schrader valve core out and hook a hose and pressure guage to the outlet.........crank engine see what you get for pressure, should have 4-6 psi from a good lift pump.

Volume test same place hook a hose to it crank over the engine 10 seconds you should get 1/3 pint of fuel minimum.

****Important the fuel shutoff solenoid (FSS) wire on the IP should be disconnected if you do not want a start just cranking. Re connect FSS after test complete.

Part Number: CP7803 for Azone guage pressure/vacuum