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Discussion Starter · #1 ·
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!
-Ken
 

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Discussion Starter · #6 ·
The belt I refer to is any of the drive belts on the front of the engine, it is usually on one. Maybe on this car they arent there, but on all my other cars they have been (non-supra's). As for the air thing, I ran the engine and filled it with fluid, so there "should" be no air to my knowledge. Unless there is another method of removing air that I dont know of. Also, the bottom picture is the sensor I broke. There were two plastic vacuum connectors, one is facing down, the other faced right - that is the one I cracked off. I tried to glue it and it did not hold. In addition to what I said earlier, I blocked off the vacuum cource FROM the EFI so there was no leak, then I manually applied valuum TO the EFI (the other of the two hoses) The more vacuum I applied, the higher my idle got, to a point. So it seems that it IS an important and I cant just block it off.
 

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Discussion Starter · #10 ·
http://www.geocities.com/mk2racer/Sensor1.jpg</img>

A pic of the sensor where it was located. Two lines did come from it, and go into that thing with the large white plastic screw on top of the EFI. By adjusting this screw, I can make the car run leaner or richer, so I assume that the thing I broke controls my mixture to some degree. I have ti have the screw cranked all the way out to start the engine, and it runs fine until reaching operating temp, then I lose power and begin to overheat. If I get out and crank the screw all the way tight, it will not over heat quite so fast, but I still lack power, and still overheat. Also, I now notice some antifreeze leaking from underneath somewhere, havent pinpointed the exact location yet, but I pray it isnt the block. If it is the block, where might I find a 6m block for cheap? And what from the 5m could I use, or maybe I should say what can't I use from the 5m? Basically, im on a kinda tight budget, Ive got a max of about $300 to throw at this problem for now. I hope it isnt the block, but if it is, maybe now would be a good time to get a new one? Also, on top of the cost of the block, what other costs might I expect (I have never rebuilt an engine before)/ I expect a gasket set (dont know how much), but other than that... no idea.
 

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Discussion Starter · #12 ·
YES!! Finally, it works again! I was going to dring the radiator and flush/fill it, when I noticed a hose full of antifreeze. Traced it back, and it hooked up to the thermo. housing. Sure enough, it was cracked and brittle by the housing! Under pressure, she leaks! Replaceed the hose and voila! No more leakage, no more overheating! I epoxied that sensor, and it seems to work, now I just have to time it and ill be doing good! Thanks everybody for the help, I really appreciate it!!
 
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