NEED HELP!

1994 Ford Explorer

Tiny

Carolleblanc

August, 16, 2011 AT 1:21 PM

1994 ford explorer. Idles rough and there is black smoke from tailpipe.
Please help

FOUND 740 RELATED QUESTIONS

Black Smoke Coming From Exhaust

65 ANSWERS
100 IMAGES

Smoking

32 ANSWERS
48 IMAGES

3 Answers

Tiny

rasmataz

August, 16, 2011 AT 1:50 PM

Sounds like its running too rich

Probable causes of an engine running rich are as follows: 1. Excessive fuel pressure can be cause by restricted fuel return line
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.

Tiny

Carolleblanc

August, 16, 2011 AT 2:02 PM

Truck starts fine but when I step on the gas it hesitates like it's not getting enough fuel. Have changed all sensors except o2. Still have black smoke coming from tailpipe so will check the above. Could this be a fuel pump problem?

Tiny

rasmataz

August, 16, 2011 AT 11:09 PM

Check the fuel pressure with a gauge if its within specs-Injector/s and fuel pressure regulator could be leaking-investigate

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