just picked up my MP3 the thurs before x-mas and since then i have had some problems with the vehicle first off heater didnt work and it had a check engine light on as soon as i left the dealer.. ok no biggy take it back they covered everything had to wait on the parts though.. well the pre-cat on my car leaks badly. and i just changed the plugs but sometimes it feels like i just lose 2 cylinders for no reason.. and i cant figure it out i looked at the wiring and i checked the coil packs visually not electricly.. * dont know how to * but would i be safe to say that it is one of my coil packs that is bad? or is it possible just cause my car is running really rich with my check engine light on?
