1999 Ford F-150

Tiny
NICHOLAS DEWITT
  • MEMBER
  • 1999 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 128,000 MILES
I REPLACED THE PLUGS AND GOT GREAT POWER
FOR ABOUT 100 MILES AND THEN IT WENT BACK
TO JUST OK WHAT CAN I DO TO KEEP IT RUNING
GREAT NOT JUST GOOD
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Tuesday, March 3rd, 2009 AT 3:26 PM

7 Replies

Tiny
BLACKOP555
  • EXPERT
Have you replaced the plug wires?

What did the spark plugs look like. Describe it to me.

Were the clean? Really dirty? Electrode eroded on it?
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Tuesday, March 3rd, 2009 AT 5:17 PM
Tiny
NICHOLAS DEWITT
  • MEMBER
YES I REPLACED THE WIRES AND THE PLUGS AT THE SAME TIME AND THE PLUGS LOOKED LIKE NEW
AND ABOUT 5000 MILES I DID IT ALL OVER AND IT DID THE SAME WITH NEW PLUGS IT HAD SO MUTCH
MORE POWER YOU WERE ABLE TO SMOKE THE TIRES IF YOU WANTED TO BUT AFTER 100 MILES OR SO YOU WOOD FEEL IT JUST WAS NOT THERE
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Wednesday, March 4th, 2009 AT 8:12 AM
Tiny
BLACKOP555
  • EXPERT
Can you get soem close up picture of the plugs?

You going with platinums? You pregapping it?
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Wednesday, March 4th, 2009 AT 8:45 PM
Tiny
NICHOLAS DEWITT
  • MEMBER
I DON'T HAVE THE OLD PLUGS I WENT WITH STOCK PLUGS AND YES I GAPPED ALL OF THEM BUT THE OLD PLUGS LOOKED LIKE I PULLED
OUT NEW PLUGS EACH TIME I REPLACED THEM
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Thursday, March 5th, 2009 AT 4:01 PM
Tiny
BLACKOP555
  • EXPERT
When the power is up have you noticed the gas mileage down? How bout raw fuel smell in oil or in the exhaust?

Are the plugs shinny white with hardly any deposits of carbon in them? Hows thecylinders look?
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Thursday, March 5th, 2009 AT 8:46 PM
Tiny
NICHOLAS DEWITT
  • MEMBER
NO FUEL SMELL BUT A LITTLE WHITE DEPOSIT ON THEM CYLINDERS LOOK FINE


http://www.2carpros.com/forum/automotive_pictures/326313_DSC02169_2.jpg

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Friday, March 6th, 2009 AT 12:56 PM
Tiny
BLACKOP555
  • EXPERT
Those plugs are horrible, go with motorcraft platinums, found at wallmart. Those ones are good with wearing out the thin electrode tip and screwing them up.

Looks like you have a bit of flakey residue on them, maybe coolant, hows your antifreeze level been? Try the plugs I suggest and make sure the plug wires are routed properly and not right on the engine block to prevent ignition problems.
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Friday, March 6th, 2009 AT 11:01 PM

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