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| uk.rec.cars.maintenance (Car Maintenance) (uk.rec.cars.maintenance) |
| Tags: braking, hdi, speeds, xantia |
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February 3rd 10, 09:16 AM
posted to uk.rec.cars.maintenance
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Xantia 2.0 hdi speeds up when braking !
My Xantia has an intermittant problem. Sometimes, at low speed , when I
start to brake the engine seems to race and the car starts to speed up. Very disconcerting ! Problem goes away the instant the brake is released and then I can brake normally. Heard of this before ???? 
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February 3rd 10, 09:52 AM
posted to uk.rec.cars.maintenance
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Xantia 2.0 hdi speeds up when braking !
doc518 wrote:
My Xantia has an intermittant problem. Sometimes, at low speed , when I start to brake the engine seems to race and the car starts to speed up. Very disconcerting ! Problem goes away the instant the brake is released and then I can brake normally. Heard of this before ???? I get that sometimes on small cars, I have large feet and catch the edge of the accellerator pedal ! Some vehicles have a noticeable kick when the air con compressor comes in. Since yours is intermittent I expect you will have to let it develop (as my neighbour says)
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February 3rd 10, 04:39 PM
posted to uk.rec.cars.maintenance
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Xantia 2.0 hdi speeds up when braking !
doc518 presented the following explanation :
My Xantia has an intermittant problem. Sometimes, at low speed , when I start to brake the engine seems to race and the car starts to speed up. Very disconcerting ! Problem goes away the instant the brake is released and then I can brake normally. Heard of this before ???? Not that particular car, but ECU controlled cars tend to be programmed to speed up their tickover a bit, whenever the car is moving - could that explain it? -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk
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February 3rd 10, 04:57 PM
posted to uk.rec.cars.maintenance
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Xantia 2.0 hdi speeds up when braking !
Harry Bloomfield explained on 03/02/2010 :
doc518 presented the following explanation : My Xantia has an intermittant problem. Sometimes, at low speed , when I start to brake the engine seems to race and the car starts to speed up. Very disconcerting ! Problem goes away the instant the brake is released and then I can brake normally. Heard of this before ???? Not that particular car, but ECU controlled cars tend to be programmed to speed up their tickover a bit, whenever the car is moving - could that explain it? I just had another thought - Idle Air Control Valve sticking open. -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk
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February 5th 10, 09:56 AM
posted to uk.rec.cars.maintenance
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Xantia 2.0 hdi speeds up when braking !
"doc518" wrote in message ... My Xantia has an intermittant problem. Sometimes, at low speed , when I start to brake the engine seems to race and the car starts to speed up. Very disconcerting ! Problem goes away the instant the brake is released and then I can brake normally. Heard of this before ???? Is it possible that there is a fault with the brake servo than upon breaking it allows air into the vacuum line, thereby increasing the engine speed?
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