will try replaceing air filter the smell i am smelling is alot like the car is running rich,but would the effect the car preformance? the car runs fine with no noted power lose, i hope that it as easy as a air filter,will change tommorrow and will let you know, thank for the info.
The PCM sets the too rich code because it is beyond the limits of adjustment the pcm has. Other possibilities include excessive fuel pressure, leaking injectors, clogged IAC valve or passage, malfunctioning TPS, MAF, MAP or ECT sensor, malfunctioning EGR system, restricted exhaust, or malfunctioning canister purge system, or a lazy oxygen sensor, according to the Haynes manual. A sweet smell from the exhaust usually indicates burning antifreeze, as in a blown head gasket.