[DrAsian]

Within the last month I have been getting more after fire then normal, I used to get just on downshifts at low rpms. Now I get it more offer, letting off in 1st in parking lots (it's funny as hell to see people jump XD) a few times letting off on the highway around 85 at 2500 to 3000. Now I have a blown gasket connecting the main pipe to the muffler. I currently have a full exhaust (4-2-1 header, manga flow hi flow, Megan cat back) as well as a lightly built up engine (03 qr block 07+ internals, stage 2 cams, 10:1 compression) at first I thought I was just running rich and needed to tune (haven't had the time to tune yet) so I was just going to remake some gaskets that were stronger (high temp copper core, hi temp goop, and stainless outer) I went to auto zone to look for some of the material I needed and while there the guy behind the counter suggested my timing could be the cause of the after fire. He seems to think that my exhaust value is opening to early. Is it timing? Is so how do we with qrs adjust? Can we advance/retard our timing?

 

[SportE-B15]

I think the timing might be able to get done via the dealer consult II computer/console.
is the car misfiring? Have autozone pull engine codes to see possible bad coil

 

[DrAsian]

I checked the codes yesterday I have none. I just have a scanner for trouble codes though. Besides timing, bad coild pack, and running rich what could cause this? And no I'm not missing.

 

[i68k]

a bad coil pack isnt good, its possible its missing a fire, and the fuel dump and burns in the exhaust, backfire. try doing an idle relearn, otherwise its possible the maf or o2 sensor is dirty causing a running rich mode, possibly even a bad crank sensor. but from your setup, ihe, you should be getting backfires, either you dont have a cat, or you blew your cat.