Idle air control hardware

[Andrew W. Macfadyen]

Later Lucas EFI systems use a stepper motor control valve to by-pass the
butterfly it works fairly well. The trouble is that it is not a stand alone
unit as the valve seating is in the throttlebody and the  available throttle
bodies (Rover 820SEi, Montego EFI, Range Rover) would be far to small for the
Jag.
On the other hand a wax bulb is pretty simple and effective.

Mike Morrin wrote:

> For my Jag V12 project, I would like to have ECU control over idle speed.
> The original Bosch/Lucas EFI used a mechanical valve driven by a wax bulb
> in the water rail.  Something more sophisticated seems to be in order.
>
> I would like to know what the junk-yard options are.  In this country there
> are no Detroit iron lumps in the junkyards,  are there any Japanese engines
> which are suitable donors?
>
> How much would new hardware from the US cost?
>
> Any other suggestions?
>
> TIA
>
> Mike