I got a mustang 1993 2.3 liter engine in it. Right under the air intake there is a little round black thing and it has a vacumm hose on it and another hose that runs to a black box under the front bumper can anyone help me i need to know what this part is and if the other side is suppose to be a vacumm also

The thermostat is located inside the steel thermostat housing, which is located on the front of the engine right in front of the throttle body housing and halfway between the alternator and a/c compressor. Remove the air intake assembly and remove the front bracket connected to the front two bolts of the throttle body. Then remove the two main bolts of the thermo housing. Lift up the thermo housing and you will see the thermostat sitting there.


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Good luck.

Your hose going to your brake booster came off or has a hole in it. It is a big vacumm hose, about one inch in diameter, coming from the engine to the round black thing behind the master cylinder. This boosts the brakes using vacumm from the engine. When it leaks, the peddle is hard to mash, and the engine is sucking air and running badly.

RIGHT ABOVE THE CENTER OF THE INTAKE MANIFOLD,COVERED WITH THE BIG AIR HOSE FROM THE AIR FILTER BOX. THAT IS IF IT USES THROTTLE BODY TYPE FUEL INJECTION!

Do a in-take vacuum test, should have 21" of vacuum, if you don't bad cat.

Drain the coolant of the radiator or pull the lower radiator hose off. Follow the upper radiator hose to the engine where the distributor is. The hose clamps on to the thermostat housing right there. Remove the big hose and removed the little hose and remove two half inch bolts holding the housing to the intake manifold remove the thermostat in clean the gasket surface with a putty knife and a wire brush. Install the thermostat and then gasket using shellacke or sealants. Reinstall bolts and hoses. Fill with coolant. Remove one of the heater hoses for the throttle body to vent the trap air out of the engine. Do this with the engine running then check the coolant level again. Good luck.

Had a 94 Olds Bravada that did a similar thing and it was EGR valve on the front of the intake. It' s easy to take off and clean with WD 40 and if you have an air compressor blow it out good.

the problem is a vacumm leak , the control panel works with vacumm from engine supplied by small hoses and also have an vacumm tank under right front fender , check for disconnected hoses or break, the main vacumm hose is on engine intake manifold, ahh , also check control panel

Ok, i had this same problem. On the driver side of the engine right under the intake mainfold there is a vacuum hose comming off the bottom of the intake, then going to a switch. if you trace the vacuum line going out of the switch it goes to the Intake mainfold Runner control. This vacumm line is made about 6 inches short and will tend to crack over time, poor design. replace the vacumm line and you back in business.