Single wire goes to the temperature sending unit in the drivers side head which controls your gauge.
The two wire temperature sensor is on the intake manifold. In most cases on less-modified vehicles there will be a two wire (black and tan) ground on a ring terminal on a stud shared with the thermostat housing hardware. This ground is for your temperature sensor. Verify that this is clean and the wires aren’t weak.
This could be part of your hard start problem. I can’t remember the exact scenario for this, but in certain instances if the ground or sensor is bad (or just plain hooked up wrong) the computer thinks it is -40° and way over compensates.
I’m not dead set on the -40° figure, I should check the manual.
The two wire temperature sensor is on the intake manifold. In most cases on less-modified vehicles there will be a two wire (black and tan) ground on a ring terminal on a stud shared with the thermostat housing hardware. This ground is for your temperature sensor. Verify that this is clean and the wires aren’t weak.
This could be part of your hard start problem. I can’t remember the exact scenario for this, but in certain instances if the ground or sensor is bad (or just plain hooked up wrong) the computer thinks it is -40° and way over compensates.
I’m not dead set on the -40° figure, I should check the manual.