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  1. Vacuum leak/ Vacuum pump runs constantly

    6.0L Problems Forum
    I have a vacuum leak in my 2003 Powerstroke 6.0 that I've been trying to trace, the vacuum pump runs constantly. So far I have replaced hub seals, o-rings, locking hubs, vacuum lines to hubs, 4x4 solenoid, and vacuum pump. Both hubs, and the reservoir hold vacuum with a handheld vacuum pump...
  2. 4x4 Solenoid Auto Engage??

    General 6.4L Discussion
    I have a 2010 F250, 155k miles. Recently I started hearing this thunk sound, typically from the passenger side front. The most noticeable was during a quick backup on the drivers front. It was random, but mostly going slow when the engine was slightly warmed up. I never could consistently...
  3. help! brake mystery on my '97.

    94-99 7.3 Repair Help
    1997 f350. My power brakes have no "power". At least some of the time. At times the brakes are normal, but then other times the brake light comes on, and I have to press really hard on the pedal to get brakes. (pedal does NOT go to the floor.) They feel like manual brakes. I've replaced the...
  4. Matt's Tech Files: Vacuum Pump Seal

    6.7 Maintenance Info (2011-2016)
    Hey all, I recently (3 days ago) picked up my second 6.7 in the form of a 2014 F350 DRW Lariat. I've decided to post here each time I complete a repair or maintenance action to help out those who may have questions. First repair: vacuum pump seal. I brought the truck home, moved my trusty ol'...
  5. Vacuum reservoir under battery tray

    General 6.4L Discussion
    So I've searched for days for an answer but can't find one anywhere. I've been without a vacuum system for a couple of years. I decided to replumb all the lines from the hubs to the pump with blue silicone lines with appropriate fittings. The T at the degas bottle goes down the driver's side...
  6. Vacuum issue or AC issue or both

    99-03 7.3L General Discussion
    I moved to Chicago last year from Arizona, from super hot summers to really cold winters. Last year I added the Max AC Assist from Diesel Site. It worked great, and the cab was very cold. Now that I've been through a cold winter, the weather is warming up, and I went to start using the AC...
  7. Brake pedal slowly goes to the floor

    99-03 7.3L Powerstroke Problems
    I was stopped at a light today and I noticed that with constant pressure, the brake pedal slowly went to the floor. The brakes work fine when I'm moving and I step on them and I didn't see any leaks after I got home and parked it. I'm not sure where to start, I don't know my way around these...
  8. NEED HELP- ABS Brakes / Power Steering / Vacuum System

    6.0L Problems Forum
    I need some advice on what to look for concerning some issues on my 2005 F250 6.0 PSD. I am pretty mechanically inclined, but have hit a wall on this without having to take it into dealership to let them empty the bank account. I will list the issues ive been having, and the repairs I have made...
  9. Seafoam in a 7.3

    99-03 7.3L Performance Parts
    Before I jump and start doing things, is it okay to put seafoam in a vacuum line? I want to throw a can in vacuum and a can of trans tune in transmission. Thanks!
  10. HVAC defrost only

    6.0L Electronics Discussion
    So my issue seems to be pretty common. The HVAC system works fine with temperature and fan strength, but it only blows out of the defrost vents. I have read several threads on this topic, and checked out the vacuum system. It all appears to be fine. I can hear the pump turning on when I crank it...
  11. Upgrade vacuum pump?

    94-98 7.3L Performance Parts
    I've gone through several vacuum pumps through the years on these OBS 7.3's and was just wondering was there any upgraded versions available? Could I go electric? Or would my cruise not work right? Just throwing some ideas out, I searched and looks like one guy was gonna try it but I never...
  12. 4x4 vacuum-hub question/problem

    99-03 7.3 Drivetrain Problems
    This is the first 4x4 truck I have ever had with a manual hub, so I am not exactly clear on a couple things. 1) I was up in the SoCal mountains last week snowboarding and I engaged 4wd high. Light came on but no 4wd. I got out and switched the hubs and 4high and 4low worked. That told me I...
  13. 200 7.3L turbo issues HELP

    99-03 7.3 Motor Problems
    ok guys first post on here. anyways i have a 2000 f350 superduty pretty much stock. What happened was i was installing a boost guage and i unplugged my waste gate control sensor because it was in my way. like an idiot i started my truck forgetting to plug it back in. now im making between 8 and...
  14. Bad Hubs??

    6.0 Drivetrain problems
    So last weekend, my vacuum pump started running constantly, sometimes while riding along I can hear some god awful noise from the "driver side wheel area". I have the manual lock hubs and the "circular"swith to go from 2WD 4HI and 4LOW, is that ESOF or do I have to get out and manually lock to...
  15. Condensation-Vacuum Issue?

    6.0 Motor problems
    I noticed the other day that I had condensation on my a/c lines when looking under the hood. I didn't think much of it at the time but it is still doing it. Problem is, I do not have the a/c turned on. Yesterday there was enough condensation to pool under the truck after driving about 30 miles...
  16. 06 6.0 prolonged crank, great start, vacuum issue?? maybe?

    6.0L Problems Forum
    Hey guys! this ones stumping me! 06 6.0 just had new injectors done at the dealership and it ran great for about 2 weeks! now when i go to start it it cranks for about 10 seconds before it finally fires. Its never done this before... I can't figure out what it could be....other symptoms i've...
  17. 94-97 PSD Vacuum Pump Replacement

    94-98 7.3L Problem Forum
    94-97 PSD Vacuum Pump Replacement Instructions I recently bought my first Powerstroke, a 97 F250 4x4, and some problems came up that I was not sure how to fix. This is for the vacuum pump.. I was driving down the road on my way to school and the brakes went out when I was going down a hill...