jeepster1991

Thank you all for your input, i think i'm gonna try tapping a location on the thermostat housing to have both sensors hooked up and hopefully solve my situation. I'll let you all know how it works out. Thanks again!!

My main concern isn't the aux fan. Without the original sensor hooked up it just runs the entire time, never shuts off at any temp range. I'm mostly worried about how the truck wants to stall when first started without the original sensor hooked up. Once it "warms up" it runs fine but i'm learning it takes 30 seconds to about 3 minutes befor the computer "regulates" itself. I really need to know how I can hook up the original and the new gauge so the computer proccesses the info from the original but i can have the new one to monitor the temp accuratey i can't depend on the dummy light alone. My truck was bone dry before that light even flickered and it got hot enough to burn off most of the oil and residue around the valve cover damn near looked like it was on fire. Know ideal how hot it really got because i had no actual temp gauge on till now.

I have a '91 Comanche 4.0 I just replaced the dummy lights with real gauges. Not realizing that the Sensor on the thermostat housing does more than just monitor the temperature of the coolant. What I need to know... is there any way to fool or bypass the computer into thinking that original sensor is still there. When starting the truck it stalls or almost stalls for about 30 seconds and runs really rough for a minute or 2 after that. If i reconnect the original sensor it starts fine, but then the auxillary fan doesn't kick on when needed and the truck runs way too hot. The reason i replaced the dummy lights is because the water pump went out and the motor got really hot before any warning light came on. I would really appreciate any input or thought anyone may have on this matter.