RE: Thermo Time Switch => Cold Start Injector Question

[Aleksander Mierzwa <alex@matrix.com.pl>]

Mark wrote:

	>I wrote:
	>    >Right below the coolant flange screwed in to the head I
have a
	>    >single pin just like the one sitting on top of the coolant
flange.
	>    >What's this one for?
	>Aleksander responded:
	>    >This is the main temp sensor for the ECU.
	>So is this the one that would signal the ECU to energize cold
start?

Yes, I guess so. You can try swapping the wires between the ECU and ISV
sensors and see if it makes any difference.
A question to the List: Is the ECU fed by the "engine cold" signal from
the multifunction sensor and if yes, what effect does it have?

	>I wrote:
	>    >What about the unit screwed in to the bottom of the
radiator
	>    >right below the lower hose?
	>Aleksander responded:
	>   >Radiator fan thermoswitch
	>So there are actually two for the radiator.  This one and the
two connector
	>unit on the coolant flange?

Yes, but the coolant flange sensor's whole purpose in life is to control
the turbo after run cooling (low speed fan + aux. water pump) after the
engine has been switched off. The radiator thermoswitch on the other
hand only works when the ignition is switched on. It's a two stage
switch that runs the medium speed fan at about 95 degrees and high speed
fan at about 110 if memory serves me right, however, you prolly have to
make a trip to Death Valley to see the high speed fan running.

Aleksander Mierzwa
Warsaw, Poland
mailto:alex@matrix.com.pl
87 Audi 5000CS turbo (mine)
88 Renault Medallion wagon (mom's)
91 mountain bike (just in case both cars broke at the same time :-)