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It cranks but does not start

Other day at work I went to start my truck and it would not turn over. It sounded like it wanted to but wouldn't. I returned the truck back to stock on my tuner and then the truck fired right up. I have had a long crank issue for awhile and just have not figured it out yet. I just did the HPOP...

Alright thanks for all your help guys. I drove my dads truck to work today which is the same as mine and his does the same thing. New to the diesel world so I didn't know, and I'm about anal when it comes to a problem with my truck. But I really appreciate the help

Ok I was starting to wonder that too. But is it normal to let out a hissing noise when it gets to the floor?

I bled the power steering pump by turning the wheel lifted in the air back and forth around 60ish times. Had a buddy watching the resevior to make sure no more foaming was happening. And it's still hard to turn the wheel when at stop. But I didn't know If that was because I have 20x12s with 420s

took it to a buddies shop to see his thoughts. He thinks that it is the Master cylinder. I have one on order should be here friday, Ill throw it in friday night and lets pray that this is the fix.

I'm starting to think that I never had a PS Issue and it was a hydro issue the whole time

I pressure bleed the brake system so it can't be that

I can't have anything backwards. I only took two lines off the power steering pump. One is threaded and I tookoff and out on with a crowfoot. And the other is the rubber return line used with a clmap

I'll have to check in park or neutral. I disconnected both the high pressure line and the return line off the power steering pump. Put the new Teflon ring on the high pressure line. Did not remove anything else or remove either from anywhere else then the power steering pump. Put the new one in...

No I think I would describe it more as a hissing over a whine. sorry forgot to put in the last post, in drive brakes applied the wheel is a hard as heck or not at all possible to turn left and right.

Hydroboost*

So new symptoms. I decided to just take it for a drive, brakes feel great on the road can't push them further then usual stop great. Come to a complete stop push a a little bit down to the floor again and now letting out a hissing noise. I'm thinking hydro booster?

No issue before this that I could tell. If I braked the truck wanted to sort of pull to the right but I thought that was because I had a a bunch of play in my wheel.

If I press the pedal hard enough it will just go right to the floor, not a slow thing just as much pressure as I put on it sends it to the floor that speed. I still do have brakes. I put it in reverse and drive in the driveway and it would still brake and also go right to the floor of I pressed...

I didn't disconnect them at the hydroboost. I just pulled the lines off the PSpump then reconnected onto the new unit.

I have soft pedel and when you out a little harder it just goes right to the floor. No brake lines where removed, just high pressure line and return line to the pump. Just to check I went through and bled each caliper no air in them. Bled the master cylinder no air in that. I'm leaning towards a...

Like the post says I had fluid under my hood by the PS fluid reservoir. I replaced the pump. Now my brakes go to the floor. I turned the wheel slowly back and forth 60 times like I read no foam coming in the system. Then bled the it from the return line going to the hydroboost Pumping the brakes...

So in Idle when I apply the brake the RPM's drop a bit. Im thinking this could mean a vacuum leak in the steering box? Do not know if I am way off or not. My understanding the steering runs with the brakes, could be way off again. I have a good amount of play in my wheel also so did not know if...

I do have a block Heater so I will see what that does. I switched to rotella t6 this oil change because I heard such good things about it. Still using motorcraft filters. I have 3500 on this oil change now. Just change fuel filters and my lift pumper filters also at the oil change time.