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Rough Idle, engine shaking, HELP

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Old Aug 25, 2006 | 09:01 AM
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Default Rough Idle, engine shaking, HELP

While scanning with HP tuners, we noticed that stb1 is running aruond 10.7, and stb2 was running 7.7. These are examples, not the exact numbers, but bank 1 was reading 2 to 3 points higher than bank2. What can cause this. I'm running in open loop speed density mode.
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Old Aug 25, 2006 | 09:04 AM
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A bad or weak spark plug... or maybe a plug wire thats not seated all the way.
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Old Aug 25, 2006 | 01:38 PM
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Plugs are new irradiums
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Old Aug 25, 2006 | 02:09 PM
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does anyone know if stb1 is the drivers side or the passenger side?
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Old Aug 25, 2006 | 02:12 PM
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bank 1 is the drivers side
bank 2 is the passengers side

Any kind of unmeasured or post cyliner leak can cause readings like that. Check for leaks...

What are you using to measure the different banks? I'm assuming WBO2 since you said you're in OLSD.
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Old Aug 25, 2006 | 10:38 PM
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We are watching it with HP Tuners but not with a wideband.
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