vavle tap

[explornj]

I have noticed a tapping/ pinging when ever I am cruzing down the highway ant he truck is around 2000 rmp only notice it when I am on the highway, just wondering what this could be, someone told me that it might be my timing chain. the truck has 129000 miles, if that makes a difference, any help will be great I need the truck to get to work and school

 

[TPLYNCH]

Have you tried cleaning your MAS? Retourquing your lower intake manifold bolts?

 

[explornj]

I will try both of thouse, I hope that will fix my problem