Okay, here is my problem: When I start the car, it runs rough. When I drive, at first everything is okay. After about 3-5 miles of normal driving, I lose power and my temp needle soars. After about 1 minute of this the radiator boils over. I try to avoid that whenever possible so I havent driven it in a few days. Anyway, a few weeks ago I overheated it bad (before I had any problem, this was my own fault). Since then I replaced the valve cover gaskets (unrelated problem) and the thermostat and thermostat gasket (which I toasted in the overheat). I dont blow any smoke and im not leaking oil or antifreeze inside or outside of the engine. I thought of the timing, but cant seem to locate any timing marks on the belt. In the process of fixing my thermostat, I had to remove the distributor (dont ask another long story) Is it possible I put it in incorrectly? To my knowledge, if it is in the wrong position then it wont run at all or extremely poorly. The only other thing I can think of is this damn sensor I broke off replacing some vacuum hoses that were old. I believe it to be a baro sensor, maybe, but im not sure. Two vacuum hoses run from the top of my EFI to it, one has a vacuum source, the other nothing, and the sensor itself has an electrical plug on it. I posted a while ago about it, and someone said to plug the source and that it didnt matter. Is this true or is that my problem? Also, does anyone know for sure what the sensor is and/or where I can get one? I pulled one off of my 3sfe 87 camry engine, and it is similar but wont work, and I got one from an 85 5mge automatic and it is even more different than the camry one. Any other thoughts? Any help would be very much appreciated!