Mechanics

F250 RUNS RICH

1994 Ford F-250

Engine Mechanical problem
1994 Ford F250 V8 Two Wheel Drive Manual

My ford f250 with a 460 runs rich. I have replaced the o2 sensor TPS and map sensors. Cap rotor plugs and wires. It is blowing black smoke, a lot of it. Is there something I may be missing or something else I could try in order to fix this problem?
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Mehboob
January 8, 2010.



Running on the rich side

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.

Rasmataz
Jan 8, 2010.
I have replaced the o2 sensor, IAC TPS and MAP sensors. I will replace the tep sensor and see how it goes

Tiny
Mehboob
Jan 8, 2010.
Best check the fuel pressure before you do that

Rasmataz
Jan 8, 2010.
Could it be possible for all 8 injectors to be leaking? What are the odds of that? The reason for asking is because all 8 sparkplugs were black full of carbon

Tiny
Mehboob
Jan 8, 2010.
Check the fuel pressure end of conversion and get back with me

Rasmataz
Jan 8, 2010.
I have checked the fuel pressure and its good. I also replaced the fuel pressure regulator, and the coolent temp sensor. Still burning way to much gas. Could it be possible that I have to reset the computer? If so how do I do that?

Tiny
Mehboob
Jan 9, 2010.
Your injector/s could be leaking

Rasmataz
Jan 9, 2010.