Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Boatboy]

One of the spigots on the 'reducing T' fitting in the main rocker cover to brake servo vacuum line has broken off and as a result I only had one connection direct to the ECU

Temporarily I have taped up the broken spigot and spliced all the other vacuum pipes off the remaining fitting and all seems to work OK. (Thanks to Mark for the vacuum layout guide in the maintenance section.)

Is this a satisfactory long term solution, or are there any valves/restrictors in the broken fitting between the two spigots, and as a result of the fix I would know have too much or too little vacuum in various places.

As well as the obvious (air distribution now works again,) idle seems to be smoother and an iteresting 'stutter' when feathering the throttle at around 60 has disappeared, but I am interested to know what all the other vacuum dependent items actually do.


Steve

[Marks DTM Calib]

Well for a start the ECU does not use Vac info (its not a MAP based control setup as it uses MAF instead).

The vac feeds are for:

Multirams - Key that this works as it affects low down torque and hence has an economy impact.

Air injection - Not important, vac hose goes to an actuator mounted on the rad.

Cabin vent setup - importnat that this works as all the direction flaps and coolant bypass setup are vac operated.

Obviously a broken stub will result in a vac leak and affect the engine operation.

[Boatboy]

Thanks for the reply. Now I have my glasses on I can read the small print. The only connection I had was to the air injection valve, not ECU as previously stated.

Now I have taped over the leak and joined all vacuum hoses together fed by the remaining spigot,  and all seems ok thus far.

Fingers crossed.

Steve