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Author Topic: Revs upto 2K when pumping the brakes?  (Read 1770 times)

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bootzey

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Revs upto 2K when pumping the brakes?
« on: 24 March 2013, 10:51:40 »
Hi All

I pumped my break pedal a few times yesterday and the revs built up to 2K.

Surely this isn't correct, what would the reason be please?

Cheers

Dave
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Kevin Wood

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Re: Revs upto 2K when pumping the brakes?
« Reply #1 on: 24 March 2013, 11:08:59 »
Sounds like a leaking brake servo to me. :-\
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bootzey

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Re: Revs upto 2K when pumping the brakes?
« Reply #2 on: 24 March 2013, 11:55:15 »
Thanks Kevin

Could this also be the answer to excessive fuel consumption that doesn't show on the MID?

Mine says 18.0 to .06 but the gauge and stops for fuel indicate 6/7 mpg.

MOT's up at the end of this month...yikes!

Dave
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ffcgary1

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Re: Revs upto 2K when pumping the brakes?
« Reply #3 on: 24 March 2013, 18:24:53 »
That fault wil be a MOT failure,  A few years ago (sorry many years ago) i had  a marina that failed because of that, get a replacment from one of the srappers on here. :y
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Re: Revs upto 2K when pumping the brakes?
« Reply #4 on: 24 March 2013, 19:45:10 »
Shouldn't leave it too long - had the servo seals go on my TR4A and there was a great cloud of whiteish smoke out the back as all the brake fluid went through the engine and was burnt off - result no brakes although handbrake was good up to 40mph!
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bootzey

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Re: Revs upto 2K when pumping the brakes?
« Reply #5 on: 24 March 2013, 20:18:24 »
yeah I know Gary. Just another problem to sort out. It's gonna fail anyway...the EML's on. I'm dreading the MOT lol thanks for the input

Cheers for the warning dbug 

Is there a repair kit available?
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dbug

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Re: Revs upto 2K when pumping the brakes?
« Reply #6 on: 24 March 2013, 20:20:03 »
Don't know about the Omega, but got some for the TR - not TR parts as the servo was off a BMC land crab.
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Re: Revs upto 2K when pumping the brakes?
« Reply #7 on: 24 March 2013, 20:23:19 »
Robseyv6 is in west sussex and will have a replacment servo for your car and reasonable price too.
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Re: Revs upto 2K when pumping the brakes?
« Reply #8 on: 24 March 2013, 20:30:02 »
Quote from: ffcgary1 on 24 March 2013, 20:23:19
Robseyv6 is in west sussex and will have a replacment servo for your car and reasonable price too.

Thats probably the best route mate  ;)
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bootzey

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Re: Revs upto 2K when pumping the brakes?
« Reply #9 on: 24 March 2013, 21:45:50 »
Cheers fellas. I'll contact Robseyv6 after I had a look tomorrow.
Ere whilst I'm here. Does the MAF have an earth for itself? I've done another post relating to this in http://www.omegaowners.com/forum/index.php?topic=112311.0
My car really can't decide whats wrong, seem to have 101 different symptoms, she's doing my head in lol
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Marks DTM Calib

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Re: Revs upto 2K when pumping the brakes?
« Reply #10 on: 25 March 2013, 08:41:29 »
Thats the first brake servo failure on an Omega I have ever heard of so second hand is a good source, beware that there are at least two types (the facelift is certainly different as it has a power stop servo)

As for the brake fluid ingestion, that would require the master cylinder to fail in a big way plus the master cylinder to servo seal so very unlikely on this setup
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Andy B

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Re: Revs upto 2K when pumping the brakes?
« Reply #11 on: 25 March 2013, 08:57:10 »
Quote from: Marks DTM Calib on 25 March 2013, 08:41:29
...
 as it has a power stop servo)
......

What's one of them?  :-\
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Kevin Wood

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Re: Revs upto 2K when pumping the brakes?
« Reply #12 on: 25 March 2013, 09:21:17 »
If you also have MAF related issues bear in mind that the servo could be leaking air at all times and this constitutes an unmetered air leak. Fix the servo first and you may find all is well.

As for diagnosis, stop the engine and see if you get a few pumps of the pedal before the assistance is gone. Check the servo feed pipe for leaks as well. This can often chafe on things if it's not been routed carefully. Does sound like the servo itself to me, though.
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Marks DTM Calib

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Re: Revs upto 2K when pumping the brakes?
« Reply #13 on: 25 March 2013, 09:22:39 »
Quote from: Andy B on 25 March 2013, 08:57:10
Quote from: Marks DTM Calib on 25 March 2013, 08:41:29
...
 as it has a power stop servo)
......

What's one of them?  :-\

It has an additional valve which opens when you hit the brake pedal hard/fast giving greater assitance and improved stopping distances
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Andy B

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Re: Revs upto 2K when pumping the brakes?
« Reply #14 on: 25 March 2013, 10:32:44 »
Quote from: Marks DTM Calib on 25 March 2013, 09:22:39
Quote from: Andy B on 25 March 2013, 08:57:10
Quote from: Marks DTM Calib on 25 March 2013, 08:41:29
...
 as it has a power stop servo)
......

What's one of them?  :-\

It has an additional valve which opens when you hit the brake pedal hard/fast giving greater assitance and improved stopping distances

Ta. Can't say as I've ever heard of one before.  :y
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