Hello
Mods are

Power FC (Obviously)
PFS IC
M2 CAI
Thrust Cat back (stock cat)
HKS downpipe

Car backfires at c. 2000 rpm when I let of the gas

Leaky injectors ?

Any ideas ?
many thanks

Riccardo

 

Too rich to begin with and/or fuel cut set too high.

 

fuel cut set too high

What do you mean exactly ?

 

On the menu where you set your idle speeds, are three fuel cut points. When you let off the throttle, the ECU will turn off the injectors then will turn them on at the fuel cut points. Fuel is cut to reduce emmissions as it is not needed when slowing down.

 

Thank Chuck
These are set low so I need to check may afrs