Pinging at high rpm/wot
Hey all - I've got the SC 91 tune, and I can hear distinct pinging in the highest rev bands 5k to 6000k. It's pretty distinct and rattly, only at the very top end, and it doesn't always happen, and it seems to be a lot less worse when the a/c is shut off. Does this make any sense? Any suggestions? Should I head down to the dealer?
It's a 91 tune, so half the tank gets filled with 89, and then the other half is 93 which I hope mix together under driving conditions to make 91. Is it maybe that the 89 was first, and maybe the bottom of the tank is to low in octane?
I'll probably drop it back to stock and see if it happens there.
2011 Brilliant Black Dodge Charger R/T Road and Track package
G8 GT (R.I.P.)
Honda Cr-v (gone, thank God)
1978 Nissan 280-z
1975 Plymouth Fury
Last edited by steveua; 06-07-2009 at 01:06 AM.