I have a 92 240sx and I just put a new maf sensor on it and a cold air intake and now it seams to be fouling out the plugs at low rpms with to much fuel I have just stright gas coming out the pipe the car runs but not good at all what do i do how do i fix this please help

 

I had the same problem, not that a extremely rough idle, but just a miss here and there, my plugs aren't fouling tho.... some things i did to mine to smooth it out a bit was pulling the IACV out and rebuilding it, the sping in the piston was a little compressed, i changed both my O2 sensors ( pretty cheap from oxygensensors.com) and ran some seafoam through the brake booster.... that helped out alot, i'm still running a bit rich but it's hella better than what it was prior to all that..... try cleaning out your MAF sensor with some sensor cleaner, it may not NEED it but it's always nice to have clean induction parts! good luck and hope some of this helps

 

you might have an injector or two stuck open dumping fuel into the cylinder()s at all times.