Engine, Drivetrain & Forced-Induction
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Help 2100 rpm rev hang and shudder

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Old Mar 16, 2021 | 10:06 AM
  #16  
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Virk370gt
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Originally Posted by SonicVQ

Legend:
• Engine RPM
• AF Alpha Bank 1
• AF Alpha Bank 2
• WBSnsb1 (wide band / air fuel sensor voltage bank 1)
• WBSnsb2 (wide band / air fuel sensor voltage bank 2)

Here is what stands out to me:
• 3rd graph: AF Alpha2 (similar to fuel trim) is a flat line
It should look something like AF Alpha1 (graph 2) , which has good max/min value

• 5th graph: WBnsB2 (wide band voltage bank 2) is a flat line.
It should look something like WBnsB1 (graph 4), which has good max/min value

Everything else in the data log looks to be ok, including the MAF voltage, rear O2 sensor voltage, throttle position, intake cam timing, and ignition timing.

Looking at this live data, it makes sense that you have those engine codes, as they point to an issue with the bank 2 air/fuel sensor and/or wiring.
Basically, the ECU is not receiving the bank 2 air/fuel sensor's signal.
Wow that's great info i really appreciate it. Ill look at the sensor to see if it's a wiring issue, if not I'll order a new sensor. Do you think this could cause the rpm stutter?
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Old Mar 16, 2021 | 11:21 AM
  #17  
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SonicVQ
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Originally Posted by Virk370gt
Wow that's great info i really appreciate it. Ill look at the sensor to see if it's a wiring issue, if not I'll order a new sensor. Do you think this could cause the rpm stutter?
I don't know if this is the cause of the stutter, but it is a problem that needs to be fixed for the engine to run properly.
Sometimes there can be more than one issue and you only find out about the second issue, after the first one is fixed.

Good luck!
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