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Discussion Starter #1
Have to replace this hose, but apparently we bought the wrong hose. What is this hose called, pn if possible, and will this ALSO affect braking if there is no power steering.

The hose in question is the one at the bottom of the PS pump that goes up into a hard line

Car is an 03 GT . Thx in advance as we are trying to dyno on Friday
 

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Discussion Starter #2 (Edited)
Thanks all. I was just informed that this is the “pump to hydroboost” pressure hose. Question i have now is will the fact that this is bad affect my braking ability? When i start the car, the brakes are hard as a rock. I figured maybe ps lines, brakelines, hydroboost might be related, so if there is air in the system (bad ps line) it will affect braking??
 

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Yes, the braking system is hydroboost, you need that line.
 

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Discussion Starter #4
Thanks Scotty- u always have the right answers:) waiting for LMR to deliver it, and then off to the dyno again!! So excited, car has been sitting since December
 

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Nice! Well at least yours wasnt sitting for 2.5 years like mine was lmao. Looks great. Nice clean engine bay too.
 

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but, if you have the brake pedal hard before start,but it continued after engine start (pedal should be soft) I think that problem is the brake booster instead of the line
 

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Hydroboost uses the PS Pump to pressureize the system. If its not getting pressure to the brake booster then its not going to provide power brakes=hard brakes.
 

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Have you verified that line is actually bad/leaking? I had to replace the Hydro-Boost unit on my 2002 GT a little over three years ago, because my power steering pump started groaning, due to low fluid level. I also had a soft brake pedal, but I think that was a result of the incompetent shop I paid $400 to install my Hawk Sector 27 brakes pads and drilled/slotted rotors (I'm a tractor-trailer driver, and was living at the time in an apartment where it wasn't possible for me to do work like that on my car), and Wildwood stainless steel flexible brake lines. They were at first going to let me take the car with a brake pedal that went almost all the way to the floor, then after keeping it another four weeks with little improvement (they took it to Lincoln dealer who bled the ABS pump), I finally got fed up and took it home, intending to fix the problem myself. That problem, I believe, was they damaged the internal seals of the master cylinder, by pushing the pedal down too far when they bled the brakes multiple, multiple times (age of the master cylinder, I'm sure, was probably also a factor).

Anyway, I couldn't find any source of power steering fluid leaking, until I checked my carpet, under the dash - fluid was leaking down the firewall and going under the carpet, getting that rubber covered insulation under the carpeting wet. So, you might wanna check under the driver's-side dash for any fluid leakage, as well as in the engine compartment, directly under the Hydro-Boost unit.

I replaced both my Hydro-Boost unit (I got a brand-new Motorcraft unit from Amazon) and master cylinder (Raybestos) at the same time; bled the brakes and power steering system, and my brakes have been fine ever since.
 

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Discussion Starter #10
I appreciate all the responses! The line is definitely bad. The fluid was low, i tightened the fiting on the pump, refilled the resovoir, and it was leaking at the fitting/swivel area, and leaked all the fluid after 5 min of idle
 

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Discussion Starter #11
Thank you all again. We replaced the hose, filled the fluid, and now the ps and brakes both work;). No leaks. Dyno scheduled for 28th. Hoping for good#s compared to before
 
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