F250 RUNS RICH

1994 Ford F-250

Tiny

mehboob

January, 8, 2010 AT 2:49 PM

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?

FOUND 362 RELATED QUESTIONS

Runs Rich

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720 Running Rich

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7 Answers

Tiny

rasmataz

January, 8, 2010 AT 2:57 PM

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.

Tiny

mehboob

January, 8, 2010 AT 5:55 PM

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

Tiny

rasmataz

January, 8, 2010 AT 5:57 PM

Best check the fuel pressure before you do that

Tiny

mehboob

January, 8, 2010 AT 6:26 PM

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

rasmataz

January, 8, 2010 AT 6:28 PM

Check the fuel pressure end of conversion and get back with me

Tiny

mehboob

January, 9, 2010 AT 2:42 PM

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

rasmataz

January, 9, 2010 AT 4:22 PM

Your injector/s could be leaking

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