2003 Ford Fiesta car missing

Tiny
ROB PARRY
  • MEMBER
  • 2003 FORD FIESTA
  • 4 CYL
  • 2WD
  • MANUAL
  • 47,000 MILES
The car is missing especially when cold in the mornings and when accelarating and going up hill I have changed plugs leads but still no difference
Thursday, February 4th, 2010 AT 1:44 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine sluggish/misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
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Thursday, February 4th, 2010 AT 3:58 AM

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