2003 Ford Focus misfires

Tiny
ISYS
  • MEMBER
  • 2003 FORD FOCUS
Engine Performance problem
2003 Ford Focus 4 cyl Front Wheel Drive Automatic 87k miles

once engine warms up it starts to misfire and to a
point to were engine quits replace crankshaft sensor
& coilpack compture codes of 2cyl misfire & 3 cyl misfire then finally random misfires engine cools for a
while and runs fine for a good while then starts to
misfire again sparkplug wires are good7
Saturday, January 10th, 2009 AT 10:47 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
When it gets hot and runs poorly, use a meter to test across the injectors for 2, 3 and then compare that reading to 1, 4 and see if those injectors are bad. Otherwise it will be something related to those 2 cylinders being next to each other. Usually 2, 3 are on the same side of the coil and that would take care of it.
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Sunday, January 11th, 2009 AT 7:14 AM

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