Why does the engine idles rough?

Tiny
SANDYBEXPLORER
  • MEMBER
  • 2002 FORD F-150
  • 100,000 MILES
Black smoke comes from the exhaust.
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Monday, October 17th, 2011 AT 4:36 PM

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Tiny
JDL
  • EXPERT
How long since a tune-up? Any applicable trouble codes? To check for codes, at the least, you need an obd2 code reader, that will work with your vehicle. Use a gage and check fuel pressure, not only check for correct pressure, check that the pressure will hold, with everything off. I haven't looked at your specs, usually the pressure shouldn't drop like a rock after the vehicle is turned off.
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Monday, October 17th, 2011 AT 5:28 PM

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