'89 S10 4.3 erratic idle speed

[Alderfek]

Originally Posted by 76C10Stepside

Next step is to figure out where the coolant temp sensor that sends to the temp guage is, guage stopped registering at all awhile back. There's one at the front of the intake manifold (somebody said that's the wrong one?).

Coolant temp for the computer is in the manifold next to the thermostat housing. Gauge sensor should be on the side of the drivers side head.