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Brake Problems? Or Clutch?

brake or clutch

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#1 county82

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Posted 18 October 2012 - 05:54 AM

hello

i recently bought an 09 ford fiesta edge, ive noticed a problem when braking. when im approaching a t junction and use the brake very gently the car slows down but then for no reason it gathers speed again as if ive lifted my foot (which i havent). there are no revs going to the engine.

it the same sensation you get when you put the clutch down (coasting) but the clutch is up, you can feel the car getting away from you until you apply more pressure.

i wasnt sure if the brake pads are releasing or there is some clutch issue ie the engine braking stops as if the clutch is down.

the reason this problem is very worring for me is because i have just started driving school business, and a learner could struggle to control the car when braking gently.

any ideas or help would be greatly appreciated

thanks

tom

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#2 alexp999

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Posted 18 October 2012 - 07:10 AM

A quick way to test the clutch is to either try a hill start or moving away with the handbrake on. You should soon know if the clutch is slipping.

I would have thought it's more likely brakes if anything. Does the car speed up and slow down in pulses or just once?

#3 LilLew

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Posted 18 October 2012 - 09:10 AM

personally i would check the brake pads see what condition they are in and change them if needed i would also bleed the brake fluid

#4 county82

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Posted 18 October 2012 - 12:15 PM

A quick way to test the clutch is to either try a hill start or moving away with the handbrake on. You should soon know if the clutch is slipping.

I would have thought it's more likely brakes if anything. Does the car speed up and slow down in pulses or just once?


its very intermittent as you gently slow down, the car then speeds up until you apply more pressure, there are no rev from the engine. it feels like your free wheeling. very odd. ive got it booked in for a check up as its still under warranty

#5 alexp999

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Posted 18 October 2012 - 01:53 PM

its very intermittent as you gently slow down, the car then speeds up until you apply more pressure, there are no rev from the engine. it feels like your free wheeling. very odd. ive got it booked in for a check up as its still under warranty


I would imagine its a braking issue then and they are not grabbing uniformly as the disc rotates, then as you add more pressure, the pads pull in more and the effects are not noticeable.

#6 county82

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Posted 18 October 2012 - 03:13 PM

thanks for the comments , hopefully it will be sorted when it gets checked next week.

#7 gadgetman

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Posted 18 October 2012 - 03:26 PM

At what sort of speed are you talking about and also what gears does it happen with?

#8 county82

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Posted 18 October 2012 - 05:57 PM

At what sort of speed are you talking about and also what gears does it happen with?


any gear as you come to a stop the moment before the engine starts to struggle and you would press the clutch, just as your about to press the clutch it speeds up, its very strange feeling

#9 alexp999

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Posted 18 October 2012 - 06:06 PM

Is this a petrol or diesel?

#10 county82

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Posted 19 October 2012 - 10:19 AM

Is this a petrol or diesel?


deisel 1.4

#11 alexp999

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Posted 19 October 2012 - 10:23 AM

deisel 1.4


I don't wish to sound patronising, but have you driven a diesel before?

Diesels have a lot more torque and bottom end power, a diesel is a LOT more resistant to stalling than a petrol. Its completely normal for a diesel car to "push" back at you as its nearing the idle limit and about to stall.

Of course you might have experiences with diesels and what you have is above and beyond that, but a diesel will fight you when a petrol would just stall.

#12 gadgetman

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Posted 19 October 2012 - 12:10 PM

Agree with alexp999
I have the Titanium 1.6 tdci and will do the same.I think that the old teachings of engine braking does not work anymore,as new cars have had anti stall feature fitted.As stated diesel will kick back at you (kangaroo).
Hope this helps.

#13 alexp999

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Posted 19 October 2012 - 12:14 PM

Agree with alexp999
I have the Titanium 1.6 tdci and will do the same.I think that the old teachings of engine braking does not work anymore,as new cars have had anti stall feature fitted.As stated diesel will kick back at you (kangaroo).
Hope this helps.


Engine breaking actually works better in a diesel as the engine is heavier, its only when you get below 1000rpm and it resists a stall that it starts having the opposite effect.

#14 county82

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Posted 19 October 2012 - 12:25 PM

I don't wish to sound patronising, but have you driven a diesel before?

Diesels have a lot more torque and bottom end power, a diesel is a LOT more resistant to stalling than a petrol. Its completely normal for a diesel car to "push" back at you as its nearing the idle limit and about to stall.

Of course you might have experiences with diesels and what you have is above and beyond that, but a diesel will fight you when a petrol would just stall.


yeah ive driven diesels, just as the revs drop below a 1000 it goes idle, changes note and picks up speed meaning you need to brake more or you will over shoot a t junction. o trid to emulate the same thing in my wifes car focus diesel and it doesnt do it.

#15 alexp999

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Posted 19 October 2012 - 01:57 PM

yeah ive driven diesels, just as the revs drop below a 1000 it goes idle, changes note and picks up speed meaning you need to brake more or you will over shoot a t junction. o trid to emulate the same thing in my wifes car focus diesel and it doesnt do it.


Its done it in all the diesels I have driven, I have usually put the clutch down before 1k RPM. My dad always used diesels for his driving school, for the very reason that it's much harder to stall them.

Still worth checking out if you are unsure though :)

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