Hey viper community I recently bought a used viper truck which I love driving. But was wondering if any one here can point me in the right direction . I was driving it on day and all of a sudden like if a a power switch turned of. I felt the engine Like it became sluggish and I was no longer able to do burnouts on it only when is on reverse I tried to pull up the codes with y he key and with a scanner but no codes show . Has anyone had this problem before I would appreciate any suggestions I recently replaced the iac valve but is still sluggish thank you . I have a 2005 qc auto