Questions about the plenum

[4535jacks]

I've just had my plenum powder coated and I've attempted to reattach it. I've done that but I've got a small, fairly short black hos left over. The inner dimension is only about 3-4mm. Where does this hose attach?
It looks the right size to attach to one of the small pipes coming out of the stepper motor mount.
Apart from the large hose, do any other hoses attach to this mount?
Of these two small pipes, the diagonal one had a small rubber grommit placed over it. Does this grommit need adhesive or sealant to stop airflow escaping?
Finally, the two identical pipes, seated next to each other on the bottom of the plenum and below the potentiometer that connects to the end of the throttle gate assembly. Well i have no tubes connected to any of these pipes where as the picture of the plenum in the 'bible' shows a rubber hose connected to one of these pipes. is there suppose to be a hose connected to one of these pipes, if so which hose?

Thanks in advance
Gary

[spend]

The vac pipe from the stepper is to the fuel pressure regulator OTOMH.

I hope you just unbolted the throttle heater under the throttle housing and discarded it We don't use it so its just ballast as well as two unsightly hose stubs

[blitzracing]

But dont do what I did and discard the screws- it lets in lots of air and the car runs very badly- took me some time to find my mistake!

[changingman]

4535jacks said:

Finally, the two identical pipes, seated next to each other on the bottom of the plenum and below the potentiometer that connects to the end of the throttle gate assembly. Well i have no tubes connected to any of these pipes where as the picture of the plenum in the 'bible' shows a rubber hose connected to one of these pipes. is there suppose to be a hose connected to one of these pipes, if so which hose?

Thanks in advance
Gary

Just put on my 72mm plenum today, there is nothing connected to these two, well not on mine anyway

[Chimjunkie]

Tried my 71mm plenum the other week and the car idled at over 2000 rpm and gave an engine fault because the poor wee stepper could not cope! Think it has a few leaks. Will have to wait for warmer climes now before being bothered to sort it out.

Tried removing the water heater bit years ago and noticed the tapped holes for it go right through into the air intake!

[daz the plumber]

is it standard to have the pipe blocked off ,was it that way from new .i thought it`s needed to bring warm air in to the plenum from a cold sart .

[AntonyJ]

daz the plumber said:

is it standard to have the pipe blocked off ,was it that way from new .i thought it`s needed to bring warm air in to the plenum from a cold sart .

Possibly so, but this isnt what you want for good power. Easy to remove the heater and loop the connections off.