I have an 88 Ranger also. I've been posting to the alt.trucks.ford group.
I've got problems with the engine not getting up to a good operating
temperature. Usually stays just above the first line on the guage and the
heat sucks. Also don't think my two barrell is working properly.
Exactly where is the heater control valve you are talking about? There are
two hoses coming out of the heater core itself. One goes to the bottom front
of the motor, around the bottom of the water pump I think. The other hose
from the core goes a little ways and then there is a tee fitting. the line
from the tee fitting goes to right beneath the carburetor. The hose on the
other end of the tee goes to the top of the water pump around close to the
thermostat housing. Whew!!!!!
I'll keep my eyes posted to see if I can find anything that might help
either of us.
special instructions I need to follow to replace it?
====================If the engine wont heat up the problem is the thermostat is stuck open,
replace it. The heater problem is probably because of the same reason, or it
is low on coolant, or if it has one, the heater control valve. Do the t-stat
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