Detonation Pinging

[Roger_4.6_96]

I hear Strange noise over my exhaust only happend at full throttle between 4000 4500 rpms

i read running higher octane would fix the problem but im limited to 91


Any Help Greatly Appreciated

 

[Roger_4.6_96]

Should i get 3.73's or 4.10's or what CAI make sthe most HP

 

[GoBabyVroommm]

You might need a tune up plugs, wires, coils. If that doesn't work check your timing. Water in your fuel tank may cause pinging as well. You can check your fuel injectors . If your running lean/not gettin enough fuel, it will ping.

410 if your running n/a 373 for blower.