1986 mustang GT 5.0 5 Speed
 

I was wondering if anyone has had the same thing happen to them as I do. My 5.0 is idling ruff and blowing black smoke out the tail pipe. Is smells like it is getting to much gas and the plugs are black. But it still starts. When you put power to it, It seems to run fine. When it is idling, the RPM'S are down and when you are driving it, It stalls when you stop. It starts right back up. I have tryed a few things like new o2 sensors, It has new plug wires, new plugs, new fuel pressure regulator.

Re: 1986 mustang GT 5.0 5 Speed
 

check your tps, it should read close to 1 ohm. Check your air charge temperture sensoe for dirt in the sensor. Have you checked your ignition timing. How is your airfilter? you said plugs and wires, did you do cap and rotor? map sensor, check its values, thats a start.

Re: 1986 mustang GT 5.0 5 Speed
 

I haven't tryed all that at this time. I put new injectors in it, But still having the same thing happing.