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Misfire

  • blackpuma
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2 years 4 months ago #61923 by blackpuma
Misfire was created by blackpuma
2015 Nissan Xterra pro-4X

• Loss of Power
Check Engine Light On. Code P2099 and P0158 I bought O2 sensor B2 S2 OEM down stream replaced it check engine light gone but the vehicle still have the same symptoms
Poor Fuel Economy. Backfiring. Misfiring Engine• Spluttering and Coughing Sounds. Jerking and Vibrating. Specially during Acceleration bug hesitation very slow when taking a ramp even when I press more gas. What’s interesting is some times the vehicle its just fine like a wild horse only some times.
Replaced fuel pump
Replaced Crank sensor
Replaced Cam-shift sensors for both banks
Mass Air flow sensor
Spark plugs
PCV
Replaced VVT valve timing solenoid B1 & B2
ALL OEM PARTS FROM THE DEALER
I basically became a parts changer the thing that you always warning us about not to become one.

Only couple of things that ai haven’t replaced so far is-
Coil ignitions
Fuel injectors
Up stream A/F O2 sensors B1 & B2.

I want to mention that I take very good care of the engine like premium fuel, best synthetic oil
If you look at the engine inside it’s crystal clear 0 carbon build up, you could put a white napkin inside the exhaust and pull it out and you wont find carbon.

I really apologize for the prolonged message. But wanted to cover as much as possible.
I just want to know is it electrical problem means ignition or fuel problem means injectors or emission system like
O2 sensors/ evaporative ext

Thanks in advance

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