I've been running rough and throwing misfire codes for the last week or so. Took the Rover to my mechanic and they changed out all the injector gaskets, or whatever you call them, due to them creating a vacuum leak. Anyways, it was still running rough and still throwing misfire codes in #4 & #6. I just noticed this hose looks like it's missing a clamp. Does it need to be pushed further on and clamped? I tried clamping as is, but still get a hissing sound on it. I've been trying to push it further up so it's flush, but can't get it over the base of whatever the hose is going over. I'm trying to locate this in the RAVE, but haven't found the correct page yet.

IMG_2779 by mchlmrtz, on Flickr

 

Actually, I think my vacuum leak is coming from the part just to the right of the bigger hose. Still trying to find these in the RAVE, but no luck yet.

 

The large rubber hose goes to the oil separator on the passenger valve cover (similar to a pcv valve). The smaller plastic hose connected to the intake with a quick connect runs behind the engine along the firewall and goes to your vacuum brake booster.

With the engine running, spray along the vacuum lines and various gaskets with carburetor cleaner or starting fluid. If the engine RPM goes up as you are spraying, you have found a vacuum leak because the cleaner/fluid is being sucked into the engine right there.

 

I sprayed around those hoses, and the smaller one, with the red disc on it was affected by the spray. I just don't know how to unplug it from there.

 

The red clip has 2 parts to it. There is a smaller ring that fits right around the black tube. You have to push that smaller ring towards the intake which will allow you to remove the tube. It's sorts counter intuitive: push the locking ring one direction while pulling the tube the opposite.

The axle vent tubes use the same kind of disconnect.

 

Anyone know where in the RAVE I can find it?

 

On my RAVE it is on 30-2-17 Gasket-inlet manifold-upper step 12. It doesn't really go into any more detail than to "disconnect" it though.

 

Ok. Brake servo vacuum pipe. That will help me a lot in my search. Thanks!

 

I occasional get vacuum leak codes to and have not be able to locate the leak but I will try your method!

 

If you're looking to replace that brake servo fitting order a new one from AB. Best way to replace it is to remove the throttle boddy and use a 3/8th ratchet extension (long) to push out the old fitting from inside the intake manifold.