Ping engine knock on load and at high speed on passing someone. new gas and additive ..two new tank fulls only 9000 miles and still have ping and knock
Answer
What kind of fuel are you putting in. if you are putting in 91 octane or to high of octane then this could happen. but your timing could be off a little. that new of a van should still be under factory warranty so have a dealership check it out.