1984 F150 Black Smoke Rich Idle

1984 ALL OTHER MAKES ALL OTHER MODELS
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DENNIS
  • MEMBER
  • 1 POST
My truck has black smoke coming from the tailpipe, a lot of soot under the hood, while in drive it idles rough. I put a new fuel pump and EGR valve. Truck is getting really bad gas mileage. Also replaced brake booster, new pluts and wires and pulled plugs and they were black soot. Any suggestions on what the trouble may be?
Jan 15, 2006 at 4:01 AM
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DB554
  • ✓Experienced Mechanic
  • 35 POSTS
sounds like to me either your choke needs to be adj. or your carb. needs to be replaced. Your gas is burning way to rich.
Jan 15, 2006 at 7:57 AM
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KENNJOY
  • MEMBER
  • 15 POSTS
your car is burning oil badly it seems so do an oil change and see if that helps or your air filter is filthy and needs replacing
Jan 15, 2006 at 4:14 PM
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DUDE
  • MEMBER
  • 50 POSTS
ever think of doing aa compression check on the cylinders to see if you have blow by indicating you have a worn out engine
Jan 16, 2006 at 5:44 AM
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Suggested Repair

Adjust the choke or replace the carburetor, since the engine appears to be running too rich.

Conversation Summary

A 1984 F150 has black tailpipe smoke, soot under the hood and on the plugs, rough idle in drive, and poor fuel mileage despite a new fuel pump, EGR valve, brake booster, plugs, and wires. The expert said the fuel mixture is too rich and recommended adjusting the choke or replacing the carburetor. Other users suggested checking for oil burning, a dirty air filter, or low compression from a worn engine.

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