Ok, i went from a high-flow catted downpipe to a catless downpipe and my car was running like complete ****. I was getting all kinds of codes. So what i did was install a new O2 sensor, put and angled defouler on it, and replaced all my spark plugs. I just drove it to see if it was fixed and its not. WOT in 2nd it'll slowly go to 4 grand and very slowly go up from there. Same in every other gear. What could be the problem??? Please help me out guys.

The codes im getting now are:
P0030-HO2 bank 1 sensor 1 heater circuit

P0102-Mass or Volume Air Flow Circuit Low Input

P0443-Evaporative Emission Control System Purge Control Valve Circuit Malfunction

Bump need help!!!

 

those codes dont have **** to do with not having a converter. sounds like your first oxygen sensor is unplugged or shorted out.

or your inj fuse is blown. go under the hood and check for a 10 amp fuse marked INJ on the schematic. see if thats popped.