ABF vacuum hose into the bulkhead

[aminorthreat1]

right cheers, that would explain why its not pulling at all then. good job i came to replace them hoses, otherwise i'd be scratching my head for even longer!!

[garfayliu]

Resurrecting this post.

I was doing my routine vac hose inspection and thought about renewing my hoses.

Anyway, I realized that the hose on the back of the manifold goes to a T-piece behind the coolant reservoir presume for air con or something.

Then the hose from the brake servo/cylinder goes to the ecu.

I've left them as is for now, but the hoses have not been touched for several years. Can anyone reconfirm please, that the hose on the rear of the manifold next to idle switch goes the to ecu? I'll then try swapping around to see if it makes any difference.

[rubjonny]

depends on the age of the car, the early abf have the ecu connection to the brake servo, the later ones run to the inlet

[garfayliu]

depends on the age of the car, the early abf have the ecu connection to the brake servo, the later ones run to the inlet

I've got 97 P-plate, which I thought was late mk3. I'm not sure how much difference it makes, as the brake servo is still connected to the back of the manifold.

Red hose - from brake servo to ecu, also connected to Green hose into right rear of manifold.
Blue hose - goes to T-piece and splits off in two directions but not the ecu.

[rubjonny]

blue hose deffo should be to ecu, what's prob happened is one or both have been off and whoever did it mixed them up. it doesn't really matter as long as there arnt any leaks, but i would put ecu to inlet anyway.  the other pipe will be for aircon if fitted, 1 goes to bulkhead the other to the vacuum reservoir