Engine knock from cold air intake reflash

[Toolman4]

Had the flash done and now have what sounds like engine knock at low rpm.  This is on 89 octane. Happens when shifting..... not in a gear cruising.  Anybody else notice this? I gained about .5 miles to the gallon and pretty sure it leaned it out. I will have to try it with premium.

Edited September 8, 2021 by Toolman4

[Rob Mugs]

Detonation doesn't usually happen at idle.  Things like hot ambient air or climbing a hill (putting load in the engine) will cause it.

 

I would look elsewhere

[redwngr]

Perhaps the fuel injection noise is more apparent after the programming update.

[Toolman4]

The premium didnt help. It  happens at 1200 rpm just after a  shift and definitely sounds like det ping  or like not getting enough fuel.  Ran great before the program.  If I let off and slowly roll into it at that 1200 rpm she rattles.  With the better mileage I know they took away some fuel.  I wonder if they could just add back a little fuel at that rpm. 

Edited September 22, 2021 by Toolman4