1999 Ford F-150 Performance Issue

Tiny
SOUSADAD
  • MEMBER
  • 1999 FORD F-150
This guy that supposedly worked for a Ford dealership garage said that there is a known problem with the butterflies not opening properly when you shoot the gas to a 4.2L V6 (99 model). Is there anyone out there that can confirm this? Personally, I am thinking that my problem is plug wires. They are new but not OEM. When my truck comes up to operating temp, the truck wants to sputter a little when accelerating out of each gear (it's a stick).
Monday, January 23rd, 2006 AT 7:24 AM

1 Reply

Tiny
LOVESCARS
  • MECHANIC
  • 359 POSTS
This does occur but I've only heard of it a few times. It's easy enough to manually move the trottle lever to see if it moves freely and look for any wear on the pivot shaft.
Could be a throttle position sensor too. Have you changed you fuel filter recently highly overlooked item that can consume peoples wallets at repair facilites.
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Monday, January 23rd, 2006 AT 8:45 PM

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