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Rough Idle, engine shaking, HELP

Old 08-25-2006, 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.
Old 08-25-2006, 09:04 AM
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A bad or weak spark plug... or maybe a plug wire thats not seated all the way.
Old 08-25-2006, 01:38 PM
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Plugs are new irradiums
Old 08-25-2006, 02:09 PM
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does anyone know if stb1 is the drivers side or the passenger side?
Old 08-25-2006, 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.
Old 08-25-2006, 10:38 PM
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We are watching it with HP Tuners but not with a wideband.


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