2001 kia sportage soft brake pedel still doing a complete brake job same as before changing the calipers/pads/ shoes /master cylinder /brake cylinders rear/ bleeding comp. system ? ANY HELP .yet the low pressure light dose not come on even when the pedel is to the floor.

Hi from the uk have had this problem on a customers car b4 who had replaced frot calipers and pads and pedal went to floor on inspection of caliper i found that the steel spring clip that fits into two holes in the front face of caliper and must also locate behind the caliper carrierbehind two lugs was fitted incorrectly it had been fitted behind the outer pad resulting in when brake pedal off ?the caliper being floating type as it is known because it is fixed by two screw pins/bolts and moves on these pins/bolts as pads wear ? what happens is the spring fitted wrongly ? actually pushes against the outer pad and as a result the caliper piston is pushed back into its cylinder slightly as it moves on the locating pins/bolts resulting in pedal going to floor on 1st application but if pumped ? some brake pedal force is felt but is lost again when pedal released ? so try this ? remove the steel clips from both front calipers that retain caliper to carriers then press brake/pump pedal ? if as suggested above works? your pedal should pump up and remain ok when you release and still be firm when re applied ? all above is what i found on ford ford but many other models use similar calipers and spring locating recheck how this spring should locate hope this helps ? good luck

Soft brake pedal usually indicates air in the brake lines or cylinders ... make sure the system bleeding was done correctly .. if thats ok then look for a damaged flex hose going to brake cylinders .. often you can't see the damage but can feel it .. if someone applies and releases the brakes (gently to avoid a blowout) , you can feel each flex line for expansion .. good ones will stiffen under pressure but a bad one will expand (broken cords inside) .. make sure your helper does not apply too much pressure .. you don't want a brake line to fail while you are near it .. sometimes an air bubble can be trapped in the master cylinder .. since the air wants to float up then you must use enough force to move the air bubble downward and out the bleeder screw .. make sure you are getting clean fluid out of the bleeder .. old fluid still works but brake fluid in general has an affinity for absorbing water as it ages .. make sure you top off the fluid while bleeding. (or use a pressure bleeder kit) ... if you have shoe type brakes in the back that have had the wheel cylinders cleaned / resurfaced then the old pistons may no longer be the correct size .. the rubber parts can extrude around the undersized piston creating a soft feel and eventual brake failure ..
a cracked caliper can also cause a soft feel .. again have someone apply the brakes and look for flexing of the caliper ..

It's not low pressure, but uneven pressure from front to rear.
Are you bleeding properly using the tubing in the bottle.
Have you tried pressure bleeding?