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drifterboyE3 02-06-2013 10:30 AM

erratic speedometer and missing?!
hey guys i got an 01 focus with the 2.0 zetech this past august. recently it threw a check engine light for a #4 cylinder miss. it does not do it all the time but when it does my speedometer will jump up an undetermined number. does anyone have any ideas on this. has an AEM intake and recent tune up if it matters.

Benner 02-06-2013 10:37 AM

New coil pack, plain and simple. Me an a million others have had this problem

drifterboyE3 02-06-2013 10:53 AM

is this something i should expect in the future? or is it just a problem with OEM units

Benner 02-06-2013 12:02 PM

Seems to be an issue with the Ford units. I've replaced them in other models too. Ford isn't known for their ignition coil strength.

focusmaniaczx3 02-06-2013 06:39 PM

replace it with motorcraft. do not use any other brand or you will regret it.

zetecDon 02-07-2013 03:32 AM

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