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Hello all, my friend has a 2004 Hyundai Sonata GLS V6, and it seems the brakes don’t feel right to me when I’ve driven the car. You have to push the pedal harder than most cars to stop it effectively. Other people who drive it say the same as me, but the friend who owns it is used to it and doesn’t notice it as much. The pedal is not soft/mushy and has a nice normal hard feel to it, so I don’t suspect the master cylinder or the booster. The pedal feels normal it just seems like the brakes lack a bite, and you have to press harder on the pedal to stop it. The car is very low mileage (40,000 some-odd miles) so I’m thinking the brakes haven’t been done yet. The pads are worn but not anything I’m concerned about, they have some material left. Would a new set of pads and rotors cure this problem? I’m thinking maybe just old friction material/glazed, maybe? The car is off the road right now due to him being away at college, so this would be a good project some day over the summer. Any thoughts? Thanks!
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yuo must check the back brake caliper rust on pins and check the pads if they are not stick on the pads support pieces whre the the pads go true most of the time they are too tigh inside that part so clean that properly and you gonna see the difference your car have 7years the rust come fast on under a huyndai !!!! hahaha
check your emergency linings pads inside rear disc too if they are not seize…………Hi RyanS93,
If the vehicle has rear brakes drums, a good adjustment on the back shoe pads might be all that is needed. If the vehicle is equipped with rear disc brakes, then it could be that the original pads and rotors are in need of replacement. Based on the year and mileage, I would assume these brakes are the original. I would not be surprised if they need to be changed out. Good luck and keep us posted.
+1 on BigC’s post. If the pedal was very hard then you wouldn’t have power assist, usually a sign of a bad brake booster.
Is there a sign of alot of brake dust on the front wheels?Let us know what you find.
Quoted From dreamer2355:
+1 on BigC’s post. If the pedal was very hard then you wouldn’t have power assist, usually a sign of a bad brake booster.
Is there a sign of alot of brake dust on the front wheels?Let us know what you find.
+2 The brake booster is what comes to mind.
With the car off, press the brake pedal down a few times. Does it get harder to press after the 2nd or 3rd time or does it always feel the same? If it always feels the same then something is wrong with the brake booster.
I don’t have access to the car so can’t see about brake dust. My thoughts were just renew the brakes and they’ll be good as they’re probably just old and have lost their effectiveness. The pedal feels normal to me, but how could I test the brake booster? Seems like if it lost power assist it would be REALLY hard to stop and it’s not, just harder than normal. I will replace the pads and rotors all around eventually, that sounds like the best option. It won’t be for a long time, but I’ll probably make a write up or video to help people out, even though they look pretty standard. Also this car has rear discs. Thanks guys!
EDIT: Just saw the post about testing the brake booster, so disregard that part of the post.
I recently replaced the front pads and rotors on my son’s mom’s car (so you know I was beyond careful, because my 7 month old son rides in this thing). It’s a 2005 Suzuki Forenza. I did the job and went to burnish the pads, and the pedal felt very soft to me. After about 40 35-0mph stops, I had her drive it. She said it felt better than normal, but not unusual. This is the first time I’ve worked on a Suzuki vehicle that wasn’t a dirt bike, so I trusted her judgement. I went as far as to make ’emergency stops’ to make sure the vehicle was capable of them, and it was fine, even thought I HATE doing that on newer brake hardware. She has not given me any complaints, even though I told her to give me a heads up on anything she thought was suspect, for obvious reasons. Sometimes, it’s just the car’s design that you aren’t used to, which seems to be the case there. As to your case, it could be a similar issue. Brake boosters in my experience fail do to the ‘lung’ failing and making an obvious hissing noise and the brakes are much harder to use. Otherwise, they could be attributed to extremely low vacuum in the engine I think. Just my take.
Edit: One thing I forgot to mention, because this is the second time I have had a similar experience, is to drive the car before you do the job, especially if it is something you haven’t driven normally. For instance, I drove my F-150 to the job site, and my F-150 has very touchy brakes. So, if you drive the vehicle around the block and get a feel for the pedal beforehand, you won’t be wierded out if it feels the same way when you are done. I should’ve done this with kid’s mom’s car, but I didn’t, which caused me unnecessary worry.
Sometimes it’s the friction material but I’m with a those in the booser camp however I’d like to add something and that is the posibility that there is a vacuum leak at or near the booster or if there is a problem with the ckeck valve going to it. See what you come up with after your ‘booster test’.
I would check the vacuum of the engine with a vacuum gauge. Insufficent vacuum will affect power assist. Check valves too are easy to test by removing it and trying to blow through it both directions. You should only be able to blow through it one way.
Quoted From dreamer2355:
I would check the vacuum of the engine with a vacuum gauge. Insufficent vacuum will affect power assist. Check valves too are easy to test by removing it and trying to blow through it both directions. You should only be able to blow through it one way.
Good point, thanks for the post.
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