So i just got done doin a pull in my 87 fc TII and then my add coolant light comes on with a buzzer..i pull over into a wawa, take a shirt put it over the rad cap, losen it, and its filled. I take off the other cap onto of the motor...also filled...then as im driving it home, its going on and off as it pleases...anybody every herd of this? Is my rx a retard?

 

Air bubbles in the cooling system?

Or perhaps a defective sensor. It's located at the top of the rad. If the wire is loose, then the buzzer may sound.

 

Thanks man, ill check it all, i think im ganna replace both caps also to make sure there both still good and not letting air in the system when its under pressure

 

sorry but im bringing this back from the grave, instead of making a new thread. K 86 gxl, my original radiator did not have a sensor on top by the cap. i put in a different one from my other gxl and it has a sensor but its broke and no wire connector. so i got a new sensor but where does it go into the wiring harness? and will this make my dummy add coolant light go off? my car has had that light on for 3 years now lol i daily drive. i just added antifreeze for the winter and burpped it so no air pockets and i have the proper amount of coolant. my car floods all the damn time and somtimes im lucky and it doesnt. fixing this add coolant deal, will it solve my flooding problem? seeing as the ecu doesnt know the coolant temp and my car stays in warm up mode and it tends to flood when i park it. i have new injectors but with this cold *** missouri weather im having a hard time starting it. appreciate all the help.

when you think you know all anout rotarys then comes up somthing new lol