Nick_Rego
Registered User
So ive recently switched over from the factory style rubber hoses and plasric caps on my 91 7.3 too the R&D style fuel rails. i installed new O-rings and a few new fittings and what not to make everything work how it should. the trucl runs fine actually runs better than it ever has mostly becasue i finally changed the oil filter while i was doing the rails...
anyway i did thos swap mainly becasue my hoses leaked and i was having the typical loosing prime issues these trucks have when you get some air in the lines. I alos happed to have a buddy who hd a truck he was parting out that had them on it and only wanted $100 for the whole setup so figured beata the nearly $300 R&D asks for them, and they were in grear shape.
Anyway i am still having the same issues in the morning with it starting up and stalling shortly after and then needing to crank the fuel back up to the filter and into the pump...
from what i understand is the air allows the fuel that would normally return to the pump and that stays in the lines for next time you start runs back to the return hose that runs all the way back to the tanks. i was wondering would it be possible to put in a small electic fuel pump into the return line to restrict the return to the tank and also to send fuel back up to the rails just when the keys on and glow plugs are warming up so it is essentially just a priming pump? would doing this potentially cause any damage or issues with fuel not being able to drain back to the tanks while its running? the other issue i thought of that fuel being pumped back from the tank would need to be filtered as well meaning even more restriction for the return when its running. mabye use a simple gas style inline filter but id also be worried about water if for some reasom there was ever some in there.
my second option is dedicating one of the two tanks to a priming tank and having that pump inline before the selector valve and hook the pump to a simple toggle switch or the glow plug relay so its only on when the trucks not running. only issue i see there is if i dont run the pump all the time the mechanical pump will have to pull fuel threw that pump and i feel like that restriction might be an issue when running that tank. does any one make a run threw pump that would solve these issues where i can just run it when im warming the plugs pump fuel up to the mechanical pump so its got plently of fuel to get it started. any suggestions or help would be much appreciated thanks.
anyway i did thos swap mainly becasue my hoses leaked and i was having the typical loosing prime issues these trucks have when you get some air in the lines. I alos happed to have a buddy who hd a truck he was parting out that had them on it and only wanted $100 for the whole setup so figured beata the nearly $300 R&D asks for them, and they were in grear shape.
Anyway i am still having the same issues in the morning with it starting up and stalling shortly after and then needing to crank the fuel back up to the filter and into the pump...
from what i understand is the air allows the fuel that would normally return to the pump and that stays in the lines for next time you start runs back to the return hose that runs all the way back to the tanks. i was wondering would it be possible to put in a small electic fuel pump into the return line to restrict the return to the tank and also to send fuel back up to the rails just when the keys on and glow plugs are warming up so it is essentially just a priming pump? would doing this potentially cause any damage or issues with fuel not being able to drain back to the tanks while its running? the other issue i thought of that fuel being pumped back from the tank would need to be filtered as well meaning even more restriction for the return when its running. mabye use a simple gas style inline filter but id also be worried about water if for some reasom there was ever some in there.
my second option is dedicating one of the two tanks to a priming tank and having that pump inline before the selector valve and hook the pump to a simple toggle switch or the glow plug relay so its only on when the trucks not running. only issue i see there is if i dont run the pump all the time the mechanical pump will have to pull fuel threw that pump and i feel like that restriction might be an issue when running that tank. does any one make a run threw pump that would solve these issues where i can just run it when im warming the plugs pump fuel up to the mechanical pump so its got plently of fuel to get it started. any suggestions or help would be much appreciated thanks.