Shooting flames after ecu tune

[s13drft89]

After installing my new eprom chip I sometimes (not all the time) shoot flames from the muffler, either from shifting gears or right after letting of the throttle, in high rpms. My upgrades consist of a JWT Pop charger, 2.5" turbo back exhaust, boost controller at 14.5 psi and a tuned eprom from. I checked for ecu codes and got 55 back. Any ideas as what I should do? When I tuned my Sr20 a year ago I was shooting flames as well. Is this normal with this car and these basic mods?
-Ricky

[NolimitZ32]

having no cats and the fact that the JWT tune is probably on the safe side i would say this is normal. my WRX shoots flames when its really hot outside because the mixture enriches with high ambient temp. but in short yes unless they are like 2 foot flames i think your good.

EDIT: Unless your shooting flames everytime you shift in which case yeah theres a problem.

[evildky]

you have excessive fuel and or lack of spark

have you verified that the car idles on all 6 cylinders? and that chip is tuned for the injectors you have right?

[robomatic12]

Do you have a vented blow off valve? I know people have told me mine does it, shifting at high rpm with a vented BOV makes it run rich for a second and ignites in the exhaust. Without a cat it just shoots out the exhaust tip.

[s13drft89]

Thanks for the replies. I have stock bypass valves and ngk spark plugs PFR6B-11B gaped to .35. Its running smooth at idle on all 6 cylinders. No cats as well Everything seems normal.