Question about 2005 Mazda MPV
Has a slight miss in park or in gear...worsens with just a touch of throttle applied while power braking. With even more throttle applied it can become quite steady and a hard misfire around 1800 RPM. LTFT on both banks hovering around -15 to -20 at idle in park. Fuel system in closed loop. O2's seem to be switching fine. They are not staying high or low...switch speed seems normal. Any ideas? Bad MAF? Bad Coil? No MIL present. All monitors all reset and in pass status.
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Posted on Jan 02, 2017
O2 sensors are good for 80 to 100k miles. a simple test for an O2 sensor is to remove it and shake it. If it makes any type of rattle noise then replace it. Also while the )2 sensor is out you can run a back pressure test.
Posted on Apr 24, 2009
It could be something as small Such as plugged fuel Injectors. Run a bottle of fuel injector cleaner (I use Lucas Fuel Treatment) Through the system and fill your tank with a higher grade gas and it should improve...
Posted on Dec 10, 2010
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