'88 EXP - too much gas, rough idle

I have an '88 EXP Escort with the non-HO 1.9L

I was noticing a rough idle (vibrating, sounded like it was bogging down)

I changed the plugs, wires, cap and rotor.

Still happening.

Noticed that my o2 sensor was unplugged. Plugged it back in.

Still happening.

Went to check the air filter and noticed the insane amount of fuel that was coming from my injector.

I am getting horrible gas mileage (8-12mpg)

Here is a video of what I am seeing:
http://s75.photobucket.com/albums/i283/sone4200/?action=view&current=VID_20120429_160624.mp4

Any ideas what would be causing that much fuel to be sent out?

Welcome to AF!!

One possible cause is that the O2 sensor is completely shot and causing the computer to call for more fuel than is needed. Also check the fuel system for proper pressure. If the fuel pressure regulator is bad the engine will receive too much fuel as well.

Would the o2 sensor throw a check engine light?
I'll replace it (might as well, even if it's not the problem ^_^, slowly replacing almost everything anyways)

I was told the Coolant Temp Sensor could also be a reason. When I bought the car the tach and temp didn't work on the dash. The tach is common, and I just put the temp off as related to the problem of the tach.

The Coolant temp sensor would make sense as to why the temp gauge doesn't work, and kind of explains the fuel issue (no sensor = no telling the ECU the temp of the motor, not changing the air/fuel mixture)

I've ordered my coolant sensors, I'll order up a Fuel pressure regulator and an o2.

I'll keep you posted!

Thanks for the reply!

The coolant temp sensor can have something to do with it but I would also look at the intake air sensor. If it thinks the air charge is too cold it will tell the computer to put fuel in to the engine like the choke was on. They are inexpensive and can cause a number of issues to.

So, I replaced the two temp sensors.

I went with it being that because of the temp gauge in the car not working...

That didn't help.

So, assuming it is a problem with the cooling temperature, what would cause it not to work when replaced? Is there a fuse?

My neg battery terminal is kinda ate up, but never affected any electronics or start up. Could that be a reason for it to flat-out not work?

No the ground shouldn't have anything to do with it given the fact that everything else on the car is working OK! Check the wiring to the sensor and make sure that the wiring is intact. Sometimes a break in the wiring is hard to see and can cause issues. Also if you replaced the coolant sensor make sure that it is properly grounded. If you put too much sealer on the threads it can prevent it from grounding properly and therefore not work.