04 4x4 Ext cab Short bed
It's a 5.3 auto, 3.73 gears
Purchased Oct 18 with 24 miles.
It now has 5600 miles on it. Spark Knocking like crazy.
I've ran several tanks of 87 octane through this with no improvements.
Problem: On part throttle, it has predetonation intermittently. When I say
intermittently, I mean to what degree is intermittent. It always spark
On full throttle, it spark knocks like crazy over 3500 RPMs. Its bad enough
that I can hear it over my exhaust (Flowmaster original 40 series through
the stock piping).
Is this problem typical of this year? Any common fixes?
I am planning for a lift and looking for software to support upgrades in the
future. If spark knock is something that's common for this engine and
typically blown off or can't be fixed without seriously affecting
performance, it will probably nix the planned performance upgrades.
I plan to take it in to have it evaluated, but I always like to know if my
problems are typical or not.