The part in the picture is the AC drain line for the passenger compartment. The fact that coolant is leaking from it means that the heater core is leaking.
To fix, there are two choices.
Replacement of the heater core will require the dash to be removed. This can be done by a DIY'er. I won't lie. It's a big job. IMO, the Chilton's manual has the best write up on how to do the work. A good service manual is a MUST.
Loop the heater lines. This will bypass the heater core and stop the leak. However, there won't be any heat in the passenger compartment.
Do not plug the heater lines. Loop them. The flow of coolant through the heater lines is necessary for the water pump to maintain it's prime.
ok thanks, i got another question. my check engine light just turned on today and its pulling two codes, p 0171 and p 0174 and i have the obd 2 system in it. would you know what the codes mean or have a link on where i could find the meaning?
The trouble codes that you have posted are for your fuel system running too lean. Basically this means that an oxygen sensor in bank 1 and Bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1, while Bank 2 is the opposite side. You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration. These codes could mean that the MAF (Mass Air Flow) Sensor is dirty or faulty. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor as well. In the vast majority of cases, simply cleaning the MAF sensor does the trick. You could also check for a dirty fuel filter and the proper fuel pressures.
If you need help with trouble codes, you can go to... OBD-II Check Engine Light Trouble Codes for a basic reading of what they are. All of the information I just posted was right off of this website! Hope this helps a little!
what would make the mustang die?? and then have trouble starting back up, it starts up fine now but like a couple of hours ago it died on me at a light and didnt want to turn back