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Discussion Starter · #41 ·
I’ve tried cleaning the throttle body inside and out and tightened the jubilee clip and it seems to have possibly improved slightly.

I also tested the brake servo and wonder if that might be the cause of the air leak. When I turn the engine on when warm it revs up slightly and idles at about 1000-1100rpm and if I press the brake pedal a few times it then goes up over 1500rpm. Do you think it could be the brake servo vacuum pipe that needs replacing?
 

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Discussion Starter · #43 · (Edited)
I’ll give that a try but not sure where it is could you please advise and what should I use to block it up at the manifold?
 

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If you follow the plastic vac pipe it goes to the inlet manifold on the gearbox end of the engine.

Block it up with a bit of rubber pipe with a bolt blocking up the other end.

Remember if you are going to test drive it that you wont have any assistance with braking.
 

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If you cant get the pipe off remove it at the servo end and plug it with a bolt or something. Might be easier doing at the servo end but if the pipes leaking it wont prove anything as it will still run like crap.

If you have a hose pipe. Start the engine and spray water all over the pipe with it running and listen for it sucking in water. They are usually easy to hear if you have a leaking pipe.
 

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Discussion Starter · #46 ·
Is it this pipe in red and where would I unclip it at the manifold as you first suggested as that sounds the easiest?

 

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Discussion Starter · #48 ·
I felt round to where it was clipped on and it moved slightly but I couldn’t get it off how does it detach? There was a yellow plastic ring around it or that’s what it looked like but that might be part of the pipe.
 

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Discussion Starter · #50 ·
I managed to remove the vacuum pipe yesterday and ran the engine but the issue still occurred so doesn’t look like it’s the brake servo.

Interestingly though literally the second the engine temp needle started to rise the revs increased along with it so I’m wondering if it might be an engine temp sensor issue or similar what do you think?

Also I have a separate issue with the heating I’ve had the matrix flushed and a new water pump also tried running with the cap off incase there was an airlock in the cooling system having had some steal seal in previously to stop a coolant leak but the air still doesn’t blow through very warm at all however if I rev the engine then it comes through hot. I think the only option left is to replace the heater matrix which hopefully shouldn’t be too costly unless anyone has any other ideas.
 

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Discussion Starter · #51 ·
Ok so I’ve had a new thermostat and the heating seems to have improved although possibly not as hot as it has been previously and I’ve still got the revving issue.

The garage said they couldn’t find an air leak but interestingly when it is revving if I turn the heating on the revs drop back down. Any ideas?
 

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Discussion Starter · #52 ·
I’ve noticed today that behind my drivers seat is really wet on the floor but it doesn’t seem as though water is coming in from anywhere.

Could it be the break servo or seal needs replacing and this also is the reason for my revving which has started to happen more randomly even when cold sometimes?
 

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I’ve noticed today that behind my drivers seat is really wet on the floor but it doesn’t seem as though water is coming in from anywhere.

Could it be the break servo or seal needs replacing and this also is the reason for my revving which has started to happen more randomly even when cold sometimes?
Is the boot area dry? spare wheel well? If so it will be the brake servo plate that needs removing and resealing. If it is wet in the boot check the aerial base seal and rear light seals.
 

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Discussion Starter · #54 ·
Is the boot area dry? spare wheel well? If so it will be the brake servo plate that needs removing and resealing. If it is wet in the boot check the aerial base seal and rear light seals.
Thanks and no they seem dry. Is it a costly job to replace the brake servo plate and could this also be allowing air in to cause the revving?

Also separately when I take my key out of the ignition the steering wheel doesn’t lock and when I open my door it makes a continuous beep as if I have left my keys in and my central locking doesn’t work. Is this a common and easy fix?
 

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The steering lock sometimes will only come on when you rock the steering wheel a bit. You may have a faulty key switch, one that is starting to fail so it does not see the key is out. It could also be wear in the lock barrel causing both faults?

Brake servo plate is not expensive to reseal if you DIY it? You just need 1 tube of Tiger Seal and some kind of cleaner, Brake cleaner or thinners along with a basic tool kit.
Have you tested the servo for air leaks? Press brake pedal several times until pedal goes hard then holding the pedal down start the engine, you should feel the pedal soften and drop down as vacuum builds up. If not the servo or pipe work is at fault. This will not cause the water leak though.
 

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Discussion Starter · #56 ·
The steering lock sometimes will only come on when you rock the steering wheel a bit. You may have a faulty key switch, one that is starting to fail so it does not see the key is out. It could also be wear in the lock barrel causing both faults?

Brake servo plate is not expensive to reseal if you DIY it? You just need 1 tube of Tiger Seal and some kind of cleaner, Brake cleaner or thinners along with a basic tool kit.
Have you tested the servo for air leaks? Press brake pedal several times until pedal goes hard then holding the pedal down start the engine, you should feel the pedal soften and drop down as vacuum builds up. If not the servo or pipe work is at fault. This will not cause the water leak though.
I wondered if it may just need a new barrel so hopefully that’s not too big a job.

I tested brake servo previously and thought it was ok but maybe not now. I’m thinking the plate servo leak may cause the water leak and there could be a fault elsewhere may be causing the revving. Also do you know whether it may be worth replacing the ICV?
 

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These engines don't have an ICV it is done on the throttle body by the ECU.
As Mark said early on try un plugging the brake servo line at the manifold, seal the manifold end off so it can not draw air into the manifold and run the car. if the fault goes it will be the pipe or the servo. A faulty servo will not cause your water leak though, they are 2 separate problems.
 

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Discussion Starter · #58 ·
These engines don't have an ICV it is done on the throttle body by the ECU.
As Mark said early on try un plugging the brake servo line at the manifold, seal the manifold end off so it can not draw air into the manifold and run the car. if the fault goes it will be the pipe or the servo. A faulty servo will not cause your water leak though, they are 2 separate problems.
I think I tried that but the problem remained. I’ve also checked today and it’s wet in the drivers footwell as well as behind the seat but fine passenger side. I’ve also checked the brake servo by pressing the pedals as you said and it seems fine.

I think my 3 issues are faulty key switch/barrel, possibly the o2 sensor for the revving and brake servo plate causing the water leak.
 
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