i have just finished my swap for my eg.. i had dropped an LS and hooked up a GSR tranny with it... but my car is running like a single cam after i had got new piping.. my fuel injectors are getting too much fuel and my magnaflow cat keeps on glowing bright red.. and you can smell fumes of gas.. im running with a p28 ecu chipped so i expect to recieve plenty of gas but i still run slow and backfire..? need help on what could be the cause of running like a single cam and why am i back fire and why i can smell fumes of gas so easily and why the magnaflow cat is glowing red...?

 

try a diff ecu