I got my car back from the shop and while i was driving, my air/fuel gauge ran lean. so i was just down the street, i turned back and went home. i open my hood and it was smoking. The engine temp was fine, so i wanted to check the air/fuel gauge wire. I jacked up my car and the area where the wire was tapped, the wire snapped in half. so i figured thats why my car was running lean. So my question is, since my car ran lean, would that cause my engine bay to smoke up?

 

Well, since your engine was running lean, the smoke is most likey unburn fuel. I need to know what color the smoke was.

 

it was white smoke

 

what makes you think your car ran lean if your A/f guage wire broke? are you tapping into the stock o2 sensor? if the o2 sensor wire broke, it would put the car into limp mode and run crazy rich.

 

Well, when i re-connected the wires together, i took it out for a test run last night nad it still ran lean on my air/fuel meter. It will run fine for like 10 minutes, then it leans out on the meter. Then when i popped my hood, it stilled smoke. so i'm taking it that my o2 sensor is messed up and i am running crazy rich, and my meter isn't reading properly because the 02 is messed up.

 

This is reason here to why you should never run a meter off your stock O2 sensor. you need to hit a dyno w/ a wide ban o2, and see what its doing and what RPM, or invest in a Greddy gauge, or one of similar high quality. does it run lean at idle? all rpm? do you have a fuel controler? what ECU do you have? what do you have done to your car motor wise?

 

i checked the code again cuz it came on after i was taking another test drive, so i replaced the o2 sensor and so far it has been ok. i gues when i asked the honda dealer about the o2 wire being spliced, they said that it should not be tapped into the o2 wire cuz the wire was heat sensitive. also if the current doesn't flow right, it will through a o2 code. which it did because the wire was cut inhalf, then placed back together. when i had my old o2 sensor in, after driving for ten minutes, it ran lean at all rpms (according to the air/fuel gauge). I actually got rid of the fuel controller, because i thought thta was the problem. as the ecu goes, its a stock ecu. my motor is fully done up for turbo. micropolish crank, arias 9:1 pistons, crower rods, port and polish, fully built head, etc.... just rid of the turbo a while ago. so its a built motor for turbo.