Montero Sport Brake Stopped Working

**pengmalups** · May 16th, 2017 10:20 PM

Hey Guys,

Last Saturday, I was parking my vehicle at Mcdonald's Visayas Ave. So paatras ko siya park, medyo may pasampa ng konti yung side walk. Probably 2-3 inches yung taas. Since medyo pataas yung parking, I need to depress the accelerator pedal para sumampa. Medyo kumamot yung gulong ng konti but very very minimal. Since may obstruction na sa likod nag brake na ko. Dun ko napansin na tumigas na yung brake pedal. Yes! Brake pedal. I checked it several times just to be sure. Mga 2cm lang nilulubog niya but not any deeper. Medyo nag panic na ako kasi brake na yung problem so I wasn't able to document by video. So pinasok ko yung gear sa P then pulled the e-brake, released the brake. Nag move yung vehicle forward siguro by half foot then nag complete stop. Then suddenly I can depress the brake pedal again.

I will bring the vehicle to the dealer again this week. This is something dangerous. Not sure if this is because of EBD or ASTC or ABS. I have no idea.

If someone can explain what happened then it will be appreciated. Sabi ng kakilala ko sa Mitsubishi baka daw nabigla yung brake booster. But why???

Thanks Guys!

**StockEngine** · May 16th, 2017 10:43 PM

do you have the totl?

Sent from my SM-G935F using Tsikot Forums mobile app

**pengmalups** · May 16th, 2017 10:54 PM

Originally Posted by StockEngine

do you have the totl?

Sent from my SM-G935F using Tsikot Forums mobile app

I have GLS Premium, the 4x2 A/T.

**pengmalups** · May 16th, 2017 11:01 PM

Usually diba nangyayari to kapag naka off yung engine then binomba natin ng binomba yung brake. It will come to a point na hindi mo na siya malubog and 1-2cm na lang ang ilulubog niya until start mo yung engine. That exact scenario ang nangyari. The only difference is, naka on ang engine ko kasi umaatras pa ako nun. Some people might say na baka mali lang ang tinatapakan ko. I am 100% positive na brake yun kasi sinisilip ko mismo. And hindi din pwede maging accelerator pedal kasi naka R pa yung gear ko or else hahampas ako dun sa likod. Wala naman ako clutch.

So the question is, nabigla? How come? It's not like nasa highway ako then bigla ako napaapak sa brake. Less than 4 months palang tong unit ko. Kinakabahan na ko. Nag panic kasi ako eh, hindi ko tuloy na video para may proof ako. Nag attempt ako ng mga 15-20 seconds na irecover yung brake pero ayaw talaga. Sumenyas na nga ako sa parking attendant na umalis na kasi I am trying to identify what happened.

**Janemar** · May 17th, 2017 07:49 AM

Originally Posted by pengmalups

Usually diba nangyayari to kapag naka off yung engine then binomba natin ng binomba yung brake. It will come to a point na hindi mo na siya malubog and 1-2cm na lang ang ilulubog niya until start mo yung engine. That exact scenario ang nangyari. The only difference is, naka on ang engine ko kasi umaatras pa ako nun. Some people might say na baka mali lang ang tinatapakan ko. I am 100% positive na brake yun kasi sinisilip ko mismo. And hindi din pwede maging accelerator pedal kasi naka R pa yung gear ko or else hahampas ako dun sa likod. Wala naman ako clutch.

So the question is, nabigla? How come? It's not like nasa highway ako then bigla ako napaapak sa brake. Less than 4 months palang tong unit ko. Kinakabahan na ko. Nag panic kasi ako eh, hindi ko tuloy na video para may proof ako. Nag attempt ako ng mga 15-20 seconds na irecover yung brake pero ayaw talaga. Sumenyas na nga ako sa parking attendant na umalis na kasi I am trying to identify what happened.

Could be a hydrovac problem, weak vacuum pump at idle/low rpm, vacuum leak, etc or the ABS programming.

May mga nabasa na rin ako dito, slightly related, hirap sila i-depress brake pedal(low to no vacuum) while push starting the engine. Need pa tuloy diinan pedal para mag start.

Anyway, if it happens again. Diinan mo lang ng sagad apak. May preno pa rin naman yan, matigas nga lang ung pedal. Good luck!

**vvti2.0** · May 17th, 2017 09:59 AM

Originally Posted by Janemar

Could be a hydrovac problem, weak vacuum pump at idle/low rpm, vacuum leak, etc or the ABS programming.

May mga nabasa na rin ako dito, slightly related, hirap sila i-depress brake pedal(low to no vacuum) while push starting the engine. Need pa tuloy diinan pedal para mag start.

Anyway, if it happens again. Diinan mo lang ng sagad apak. May preno pa rin naman yan, matigas nga lang ung pedal. Good luck!

ABS has no effect sa ganito, regulation alng gagawin ng ABS, it is more on related sa hydrovac or vacuum pump. Yung rpm during idle is already enough para magkaroon ka ng vacuum.

**vvti2.0** · May 17th, 2017 10:05 AM

Originally Posted by pengmalups

Usually diba nangyayari to kapag naka off yung engine then binomba natin ng binomba yung brake. It will come to a point na hindi mo na siya malubog and 1-2cm na lang ang ilulubog niya until start mo yung engine. That exact scenario ang nangyari. The only difference is, naka on ang engine ko kasi umaatras pa ako nun. Some people might say na baka mali lang ang tinatapakan ko. I am 100% positive na brake yun kasi sinisilip ko mismo. And hindi din pwede maging accelerator pedal kasi naka R pa yung gear ko or else hahampas ako dun sa likod. Wala naman ako clutch.

So the question is, nabigla? How come? It's not like nasa highway ako then bigla ako napaapak sa brake. Less than 4 months palang tong unit ko. Kinakabahan na ko. Nag panic kasi ako eh, hindi ko tuloy na video para may proof ako. Nag attempt ako ng mga 15-20 seconds na irecover yung brake pero ayaw talaga. Sumenyas na nga ako sa parking attendant na umalis na kasi I am trying to identify what happened.

Di mo na sya mailubog pa kasi matigas ang brakes kapag wala kang assistance from the hydrovac, pero kahit sira ang hydrovac mo, dapat kumagat ang brakes mo.

Hydrovac failure does not equate to failure of your brake system, bibigat lang ang apak mo.

**shotokan** · May 17th, 2017 04:15 PM

My experience with my new Montero Sport GLS AT 2017 model just bought last April 6, 2017. Siguro mga after 2 or 3 weeks na ata sa akin nun bago sya nag 1000km for PMS, nung i-start ko ang engine, kailangan mong i-depress yung brake bago pindutin yung start button pero napansin ko nun na sobrang tigas ng preno at nagtaka ako bat ganun. diniinan ko lang sya tapos pindut ng push button at nag start naman saka lang biglang lumambot ang preno nya.

ano sa tingin nyo guys ang problema neto pero one time ko lang na experience yun since bumalik na ako abroad last May 6.

**Janemar** · May 18th, 2017 01:36 AM

Originally Posted by vvti2.0

Di mo na sya mailubog pa kasi matigas ang brakes kapag wala kang assistance from the hydrovac, pero kahit sira ang hydrovac mo, dapat kumagat ang brakes mo.

Hydrovac failure does not equate to failure of your brake system, bibigat lang ang apak mo.

If nasanay ka na malambot ang brake pedal for driving x amount of years preno and suddenly 1 time biglang tumigas, trust me. Una mong iisipan and the TS can agree too, na feeling mo ala ngang preno. Nawala.

**dr. d** · May 18th, 2017 01:47 AM

Originally Posted by ;2831828

Di mo na sya mailubog pa kasi matigas ang brakes kapag wala kang assistance from the hydrovac, pero kahit sira ang hydrovac mo, dapat kumagat ang brakes mo.

Hydrovac failure does not equate to failure of your brake system, bibigat lang ang apak mo.

my experience.
when the hydrovac fails, and the vehicle is moving at speed, matigas ang brake pedal. kahit tumayo ka't talun-talunan ang pedal, ay halos wala kang brake. raising the handbrake will give you some brake power, but not much.
with hydrovac failure, the brakes only seem "strong", when the vehicle is at stop or only crawling.