Rough running 2005 Expedition

Tiny
ERIKFIAL
  • MEMBER
  • 2005 FORD EXPEDITION
  • 140,000 MILES
2005 expedition blew two codes for cop's. Replaced and replaced plugs, no codes now however, it still has hiccup while idle and at coast at highway speed. Repaced VCT's both sides still running rough, not while accelerating just at slight pedal pressure.
Saturday, October 13th, 2012 AT 8:45 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
What were the codes retrieved? Are the codes still there?
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Saturday, October 13th, 2012 AT 8:56 PM
Tiny
ERIKFIAL
  • MEMBER
  • 2 POSTS
0300, 0355, 0358 I beleive if I remember correctly. Anyway I reviewed to cylinder 5 and 8 coil fault.
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Sunday, October 14th, 2012 AT 1:47 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
The codes should be interlinked and now that the coils were replaced they have been rectified. The hesitation and rough idling could be due to low idling speed.

Try cleaning the throttle body and IAC and retest.
Are the spark plugs of the recommended specifications?
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Sunday, October 14th, 2012 AT 2:33 AM

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