GEN 2 Backfire/ pop on decel after intercooler and tune...

[Hghlndr85]

So I recently installed afe magnum intake,cobb stage 1 performance and Trans tune. Haven't had any issues. Last week I installed garret intercooler and stage 2 tune. Truck runs great. Temps outside have Been in 50s. Yesterday and today have been mid 80's outside Temps. I noticed past 2 days on decel I get a random backfire/pop through the exhaust. I usually get them when I fill the truck to full on 93 for first few Miles. But past 2 days truck has half tank. No engine lights or codes. I did remove the top and bottom shutters on intercooler when I put the garret in. Left middle one connected to avoid any codes. Is this any cause for concern or what could be the cause? I also have colder plugs in, spd trombone and corsa exhaust. Truck is an 18 with 40k.

 

[CigarPundit]

I pay for that shit. My M3 pops and burbles constantly, and I have these parameters turned up intentionally. I love pops and burbles.

This is usually caused by unburned fuel getting ejected into the downpipes or cats and is basically a timing adjustment. Many tunes do this, but I don't have a garret tune, so I don't know if that one does.

 

[KAJRIP]

I get the same thing with Cobb/Goosetuned Stage 1. Usually happens after filling the tank and goes away after driving a few miles.

 

[Hghlndr85]

Yea mine did it before the tune after fill up but never with only half tank. The tune is just it's cobb tune.

 

[Hghlndr85]

I just checked any codes and there is nothing. Just weird it only happened past 2 days it has Been hot out.

 

[Nex]

Have you replaced your plugs recently? Do you have the Goose recommended colder plugs in?

 

[KAJRIP]

Yes and yes for me.

 

[Hghlndr85]

Yes I believe I put in the motorcraft one step colder plugs about 2k miles ago.