my 02 civic keeps back firing and then dieing. the code says that the 1st o2 sensor is runing rich. I don't know what could be causing this. I thought that the o2 sensor was bad so i repaced it, still runs bad. is it the crank sensor? or the mass air ? any and all help is Appreciated .

thank
YOU all
Jake

 

the last car i had do this to be the china man put diesal into his car... dont ask me how.... cause i was like ok.... ( in my head ) isn't the nozzles at the gas pump diff for a diesal and unleaded?? try replacing spark plugs?

 

the sparkplugs work and show no signs of fouling out.

did the guy use a funnel? because thats just weird.

 

the timing belt pully was bad and kept juming on the belt. thank god i don't need a new motor because that was about 5min away if i kept driving the car.

thanks for your help.