Brakes fade - servo - vacuum pipes?

ched999uk · Jan 30, 2009

Just had to nip out in my td4 and my brakes are fine on first press of the pedal then subsequent presses I seem to loose servo assistance. Are the vacuum pumps prone to going or is is probably some silly pipe that has chaffed and th vacuum is leaking?

Any ideas which pipe it could be?

Cheers

booboodag · Jan 30, 2009

does it come back after a min and then the brakes are fine and ok

ched999uk · Jan 30, 2009

booboodag: Not really.
The first press all is fine, then the second there is less servo assist then if you release the brake then reapply straight away you have no servo assistance. You drive off and its fine again for first press, then servo assistance dies. So as long as you only press brake once per stop its fine every time.

My first car had exactly the same symptoms and it turned out to be a faulty servo pipe from inlet manifold to servo. So I am guessing its a leak in a servo pipe but I cant seem to find a vacuum system diagram on Dave.

Any ideas which pipe it might be?

booboodag · Jan 30, 2009

it could be your EGR Air Filter if it has not been changed, however we have had this symptom with a failing vacuum pump and the symptoms you have described point to it.

ched999uk · Jan 30, 2009

booboodag: cheers, is the EGR filter the same as the oil seperaor in the Oil Depression Limiter on the top of the head under the cover?
I have had a look on here Duckworth Land Rover Freelander 1 - TD4 and the EGR filter looks like a petrol filter or could it be the the Engine Crank case breather filter?

As far as I know neither have been changed.

booboodag · Jan 31, 2009

the EGR filter is the one that looks like a petrol filter(it only has a pipe fitted to one end the other is to air). I would also change the crankcase filter as if they block up its bye bye turbo. As for brakes when you have the covers of to do filters check the pipe work for holes. I still feel the it will be the vacuum pump on way out, its a easy one to change takes less than 10 mins once the covers are off.

ched999uk · Jan 31, 2009

booboodag: Thanks very much. I think I will have a look this afternoon as its not too cold. Fingers crossed its just the filter or a pipe leaking as I dont really want another big bill. I have only just had the slave cylinder and clutch done a month ago at £400 (great price, good local garage).

ched999uk · Feb 1, 2009

Found the fault. It was a split vacuum pipe blow the inlet manifold, the one that goes through a solenoid before continuing on to the egr.

Cut off the split and reconnected and brakes now fine again. For once a Freelander fixed at no cost

Cheers

Brakes fade - servo - vacuum pipes?

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