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John Bosmans
 
John99Boxster's Avatar
 
Join Date: Nov 2011
Location: Wilmington NC
Posts: 57
Misfire, Cylinder 4

Had a CEL with a code of Misfire on Cylinder 4. Replaced the Spark Plug, Tube and Connector. Still misfiring at higher gears when I "punch it".

What else could it be? The Coil itself? The Wires?

What would you do?

Old 11-14-2011, 01:51 PM
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Join Date: Sep 2007
Location: Fremont, CA
Posts: 160
Probably the coil, you could do the poor mans test and change the coil to a different cylinder to see if the new cylinder gets a misfire. Then you'll know it is the coil and not something else.
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99 Boxster 5-speed
12 Acura TSX 6-speed
Old 11-15-2011, 08:03 AM
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John Bosmans
 
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Join Date: Nov 2011
Location: Wilmington NC
Posts: 57
Problem Solved! Cracked coil replaced.

Runs great....NO CEL...no stumbling.


Old 11-16-2011, 11:34 AM
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