vacuum hose

Just wanted to confirm something really. I got a new freelander 1 td4 manual (2004) few days ago and discovered it was very thirsty.
Firs thing I noticed is it wasn't getting up to temperature, and new thermostat has needle now at half way instead of one third. Heater much hotter too. I knew that could be a cause from previous threads.

Second, on my last one I changed the very thin walled vacuum hoses to try to solve boost issues, and so started to do this as a matter of course on this one.

Now for the question: I was surprised to find a big split on the hose which goes from the reservoir to the EGR solenoid. It was right next to the solenoid and underneath, so may have been missed by anyone checking for a split in the past.

Am I right in thinking that the whole vacuum system (egr, brakes and turbo) depends on there being no leaks anywhere in the system?
Or are there compartmentalised systems, so one can be compromised without affecting the others?

Went for a test rive this afternoon and the brakes seemed sharper, but wondered if that might be my imagination.

Also, while I am asking for advice, I took the MAP sensor off to check it and sure enough the nozzle was full of oily sludge. Thing is, someone had obviously cleaned the air intake as well as EGR so cannot believe they wouldn't have bothered to check MAP sensor. Which means despite clean it got full of crap pretty quickly.

I shall therefore be taking it off fairly regularly to clean it. So how do you properly clean that thing? It is just a small nozzle that bungs up and as far as I can see there is no way to take it apart. I think it was Nodge who told me a while back to be careful of the membrane but I don't recall finding out how best to go about cleaning it. Soak it in something? If so, what?

My understanding is that although in theory all vacuum pipes are connected, the leak in a small pipe does not have significant effect on the brakes. You may have proved otherwise!

Cleaning MAP sensor is best done gently without poking anything into it. A small cotton bud perhaps. Treat it a bit like your ears!! No screwdrivers or sharps!!

andyfreelandy said:

My understanding is that although in theory all vacuum pipes are connected, the leak in a small pipe does not have significant effect on the brakes. You may have proved otherwise!

Cleaning MAP sensor is best done gently without poking anything into it. A small cotton bud perhaps. Treat it a bit like your ears!! No screwdrivers or sharps!!

Click to expand...

Well brakes seemed ok before but after new pipe they stopped on a sixpence. However I wasn’t trying to measure anything so may just have hit brakes harder. Car seems more agile and a lot less thirsty, but that could be new thermostat.

I don’t see how that sensor can be efficIent. It’s such a small hole and so easily bunged up. The measuring bit must be at bottom of the spout thing I suppose, and there’s no way to know how free of crap that is even after dosing it with cleaner fluid. I nearly bought a new one but that’s another £45 for something that could be be bunged
up in no time.