Mazda CX-9 This larger SUV adds a V6 option, as well as more cargo room, to the CX-7 option.

Change Fuel Filter on 2008 CX-9

  #1  
Old 07-13-2017, 01:18 PM
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Default Change Fuel Filter on 2008 CX-9

Had issue on inclines with jerking, thought is was transmission but when serviced indicated engine was missing. Replacing spark plugs took away most of problem but still have some sputtering on inclines. Wanted to run some fuel injection cleaner through and replace the fuel filter. I've seen some vague indication that this may be able to be accessed through a panel under carpet beneath the 2nd row seat. Has anyone done this and have advice on changing the fuel filter?
 
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Old 07-13-2017, 01:41 PM
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Are you sure your CX-9 even has a fuel filter? I ask because something like 80% of all cars built since the mid-2000s do not have such a filter.

Regarding the jerking, it is HIGHLY unlikely fuel injector cleaner and/or other fuel system maintenance will help. Have you had the codes read on your vehicle yet?
 
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Old 07-13-2017, 02:12 PM
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engine codes were read as engine missing prior to the spark plug replacement which helped tremendously
 
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Old 07-13-2017, 02:22 PM
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Any codes since the spark plugs were replaced? I'm wondering if you may have a coil issue.
 
  #5  
Old 07-13-2017, 03:12 PM
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haven't taken it back in to check codes since then. Was trying a few things on my own first
 
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