My check engine light went on a few days ago. 03 g35 coupe. 60k miles. That night after work, the idle was really tough and didn't really drive. When it warmed up, it's like there were no issues at all. I took it into autozone and got two codes. P0032 and P0302. One is an O2 sensor issue, and the other is a misfire in cinder two. I replaced all the spark plugs and coil packs. Nothing changed. Smells like fuel in idle, but no smoke or fluid leaks. Help please!....

 

Loathing, I had a very weird experience on my '05 G35 coupe a week ago. I was going through extremely erratic idle and at one point the car stalled (very low rev's). Yes, had strong fuel smell too (as if the car was running super rich.

I ended up checking the air filter... and the filter had gotten so clogged that it had collapsed and was being sucked into the inlet pipe!!!!!

I replaced the filter and cleaned the MAF sensor... on first start she was back to purring like a kitten.

FYI - I'm out at 168k miles. Dunno how you have an '03 with such low mileage!