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  1. cucvrus

    Truck keeps losing it's prime

    That's right because that's they way they belong. :). I know a guy that has trucks like that. They all work better that way IMHO. I mean 22 years and counting of private ownership. Driving them 70 MPH loaded and empty and still going. Have a great day. Glad to hear DUDE is still to your liking...
  2. cucvrus

    Truck keeps losing it's prime

    Very nice. Dude looks content and happy. Or is it happy and content. Someone may be watching.
  3. cucvrus

    Truck keeps losing it's prime

    Thank you for the "Grammar Police" I see you have followers for correcting my spelling. I thank you also. That is assuming people searching are so academically correct as the 3 Amigo's. Now do you have any helpful advise to help the "loosing" prime issue? Or do you just want to troll around...
  4. cucvrus

    Truck keeps losing it's prime

    I am still not convinced that is the ultimate answer and 100% problem solver. I have the same trucks for over 20 years and they work fine with everything the same but the seats and the paint. Everything else is just fixed and replace with the same LKQ parts. IMHO. They spent $$$$ designing it. I...
  5. cucvrus

    Truck keeps losing it's prime

    Title fixed. The Gentlemen Corvette9 has been loosing prime on his fuel injection system of a 1986 CUCV M1028 A1. I sold him the truck 2 years ago and he completely restored it. He has since had an issue with the CUCV M1028A1 dropping the fuel prime when parked. Several other people and myself...
  6. cucvrus

    Truck keeps losing it's prime

    Sit down and relax. Are you feeling energetic and relaxed? Remove the entire cargo bed. Breath a sigh of relief. You have had this bed off before and it was just recently. It will come off with ease. Beats the pants off one that has not had the bed off in 30 years and was in the north east all...
  7. cucvrus

    Truck keeps losing it's prime

    It gets my vote. That tells me it is loosing prime behind the check valve. Good job. Dude will be well again.
  8. cucvrus

    Truck keeps losing it's prime

    Did you vacuum test your repair/ I did one and it leaked. I pulled the screw out and re-tapped it I checked it with the vacuum pump and it held negative vacuum for an hour. Good enough. No problem ever since. I think you did say you changed the lift pump. Is it dry in that area? And the valley...
  9. cucvrus

    Truck keeps losing it's prime

    https://www.facebook.com/chauffeursnieuws/videos/1895616680721215/ Sound the trumpets I think you are on to something.
  10. cucvrus

    Truck keeps losing it's prime

    corvette9 any updates? Or am I rushing the old guy? I will remain calm. just check in on any progress or improvements. Dude deserves immediate attention. https://youtu.be/PcRyjkYdDxM
  11. cucvrus

    Truck keeps losing it's prime

    I knew I had this picture. Remove this piece. Screw the hole shut. Test with vacuum pump. Sealer (Right Stuff) is optional. I preferred as a secondary seal. You can reinstall the same fuel filter and be on your way. Down time about 1 hour for us older guys and cost is 1 screw self tapping...
  12. cucvrus

    Truck keeps losing it's prime

    That picture is the fuel filter base. It is bolted to the fire wall with 3 - 3/8" bolts. you will need a 1/4" nut driver (fuel line clamps) and a 9/16" socket and remove the entire fuel filter assembly. Remove that foam/plastic disc (2 wires) behind the filter. About the size of a half dollar...
  13. cucvrus

    Truck keeps losing it's prime

    Quick tip. No expense or redesign needed. I had this problem on my Son's M1028A1 and a few of the CUCV plow vehicles. I removed the pressure sensor. Not needed anyway. I put a self tapping screw in the hole in picture 2. I checked the seal of the screw with a vacuum pump. It held. I filled the...
  14. cucvrus

    Truck keeps losing it's prime

    Is this from cold start? How do they start the rest of the day after the fuel is re-primed? And you checked the round plug behind the fuel filter?
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