In order to do correct VVA/IVA delete You have to do following:

• ECM tuning of the engine computer
• backing off the VVA adjusters

ECM tuning :

• Our ECM tuning will allow you to back off the VVA adjusters all the way off, and prevent them from activating that way.
  List of CAT ECM tunes
• All our tunes for VVA delete on CAT engines come with fleet safe power upgrade that will provide You best fuel economy.

Work that needs to be done:

• You have to back off VVA adjusters ALL THE WAY OFF.
  Turn the nut counter clockwise (get the nut away from base).
  Back the VVA/IVA adjuster all the way off.
  Tighten the nut back down.
  Check the photo below, finger is pointing to one of the VVA adjusters - You need to back all 6 of them OFF.
  Do not adjust anything else(jakes for example).
  
  

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