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Question:

Need help diagnosing a cars hydraulic brake system issue.?

The front right brake piston on my 2000 Kia Sephia will only extend against the pad when the pedal is first pressed, but then quickly retracts on its own. The left one works normally. I‘m thinking that this must be some sort of master cylinder/distributor issue. Any help would be greatly appreciated, as this car barely has any braking power (even with the pedal firmly pressed to the floor) and is currently a death-trap. I don‘t think the system is leaking, since the reservoir is still full.

Answer:

that's cord depending, because in emergency circumstances often electric powered structures could malfunctions making Hydraulic structures in-energetic. Hydraulic structures are in common words sensible at the same time as the automobile is operating, if automobile is out of control, then it makes extra sense to positioned as many applications on the guide mode as achieveable to be certain that motive force receives diverse the Controls. it truly is why cord depending brakes are extra good at the same time as in disaster. maximum of what you've stated is faulty. there is merely about no electric powered aspects to the brake gadget(the brake light fixtures and the abs gadget). If the abs (electric powered) fails, it does not end the operation of the brakes. And if the finished electric powered gadget grow to be to fail it does not result the hydraulic in any respect. also the hydraulic gadget is smart in any respect cases,(if the automobile is operating its operational and if the automobile grow to be off and by no ability operating it really is sill operational. The pedal will be a lot extra sturdy to push down (at the same time as not operating) because a booster is used to assist with using the brake(the brakes are nonetheless going o end the automobile and are operational). this gadget runs off of vacuum that is in common words recent in a operating inner combustion engine. So your incorrect on all debts.) So shall we take a stab at your very last wager at how a automobile works. Cable depending brake structures are literally not used a lot any extra with the aid of very reality they're risky. Cables are extra in all risk to stretch and brake, also the rigidity you word utilising a cable gadget isn't everywhere close to the rigidity you could word utilising hydraulics.
seal has gone in the master cylinder
Not sure if your car even has one but it could be a bad brake balance valve, a bad caliper, bad ABS, I doubt it is the master cylinder because if it was both front brakes should be having that issue. You could also have air in the line going to that caliper, try bleeding the brakes first and see where that gets you, and then start looking at parts.

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