Thread: Predator ?
View Single Post
  #2  
Old 12-13-2009, 08:40 PM
erm
Guest
 
Posts: n/a
Default

Try the 89 tune first. If it still pings, you can swap tunes and use 91.

How many miles on your truck? You may not need to change out the plugs unless you suspect one is bad or something.
Reply With Quote