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  1. gnathv

    So what did you do with your truck today?

    Get a brass barbed “t” fitting
  2. gnathv

    So what did you do with your truck today?

    If that’s a galvanized fitting read this: Never Use Galvanized Piping on Your Fuel Supply Line! Diesel fuel dissolves the zinc coating and forms a solution that contaminates the fuelsupply. ... We recommend black iron, steel or copper piping and storage tanks in order to avert this.
  3. gnathv

    COOLANT/CAVITATION/RELATED QUESTIONS

    This may help. Coolant Test Strips are disposable test strips for measuring the concentration level and condition of Anti-Freeze/Anti-Boil coolants used in all types of combustion engines. They effectively test the coolant's concentration as well as the pH level and alkalinity to determine...
  4. gnathv

    COOLANT/CAVITATION/RELATED QUESTIONS

    I bought my last test strips from NAPA, they’ll probably say I’m lying lol. The strips read the nitrates in your coolant so you know if you need additives or not.
  5. gnathv

    COOLANT/CAVITATION/RELATED QUESTIONS

    .
  6. gnathv

    COOLANT/CAVITATION/RELATED QUESTIONS

    Are you adding sca (supplemental coolant additive) to your coolant and testing with strips? If you have cavitation that has actually eroded the cylinder, there will be tiny pin holes that will weep coolant into the cylinder. This will cause steamy exhaust with an antifreeze smell. You’ll have...
  7. gnathv

    Water temp gauge reading

    I’m with chillman, start with hose connections. I had a slight leak at one hose connection and it took some time to find it.
  8. gnathv

    Water temp gauge reading

    You may have a leak that is small enough that it evaporates before it can drip. Is your radiator cap in good shape (rubber gasket that seals) Do you see signs of condensation in oil?
  9. gnathv

    Turbo Removal

    You’re welcome, glad it does.
  10. gnathv

    Advice on fuel tank selector valve

    These are the clips you need to remove the fitting is similar to this once the clips are out it slides off. I normally remove the clips, spray the connector with wd40 and push the fitting towards the valve and then pull away from valve to remove.
  11. gnathv

    Turbo Removal

    The relay is always grounded. There is 12 volts on large input connection. 12 volts is applied (small wire terminal) and relay closes giving 12 volt to large output connector connected to glow plugs. Very similar to the way starter relay works.
  12. gnathv

    Turbo Removal

    On the first diagram the ground is shown by the glow plug relay as a black wire connected to ground. Above relay just to right.
  13. gnathv

    Turbo Removal

    7.3L IDI GLOW PLUG CONTROLLER OPERATION • When the key is turned to the "run" position, power is sent to the switching side of the glow plug relay (red wire, small terminal), energizing it and therefore completing the circuit between the batteries and the glow plug harness (two large yellow...
  14. gnathv

    Turbo Removal

    Does this help?
  15. gnathv

    Turbo Removal

  16. gnathv

    Turbo Removal

    Have you checked your glow plugs for resistance?
  17. gnathv

    Turbo Removal

    What are your symptoms?
  18. gnathv

    How Many Flats??

    You know you’re going at least 1 flat. Then you’ll open it again and go 1 flat to see if it’s better. Turn it up 2 flats to begin with. If it’s hot and smoky you’ll open it and turn it down. It’s just one of those things. At 750 EGT you’ve got some room for more fuel. If 2 flats gives you 1200...
  19. gnathv

    Trans cooler?

    Supposedly the pipeline is on its way back to operating. Maybe things will be back to normal shortly.
  20. gnathv

    1986 f250 6.9 IDI wont crank.

    Glad you found it.
  21. gnathv

    1986 f250 6.9 IDI wont crank.

    There may be 4 wires. You want to put the 2 red with blue stripe together. The other 2 would be for your reverse lights.
  22. gnathv

    1986 f250 6.9 IDI wont crank.

    Do your reverse lights work?
  23. gnathv

    1986 f250 6.9 IDI wont crank.

    Sorry didn’t see response. The neutral safety switch is under the truck on the driver side of the transmission where the selector lever is.
  24. gnathv

    1986 f250 6.9 IDI wont crank.

    Unplug the harness at the shift lever switch on the transmission. Put a jumper wire in the connector you unplugged.
  25. gnathv

    1986 f250 6.9 IDI wont crank.

    Most likely it is good. Jumper your neutral safety switch and try cranking.
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