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Sounds like the IMS drive sprocket has slipped on the tune for bank 4-5-6... It's a fairly common issue that throws the cam timing off.. Have the cam timing checked and reset as required.
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Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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