The condensed story is...the car is running rich: gas odors, bad gas mileage, consistently fouling plugs. The FI is all new from Nissan. I've had a Nissan certified mechanic check the obvious: fuel pressure regulator, FI connectors and the air flow meter. The fuel pres. reg. and FI connectors are all new and OK. His remark about the AFM was "its open all the way", which I interpret to mean that it's getting all the air it can get with the current AFM. His suspicion, so far, is that the AFM may need to be replaced. I would be willing to replace it, if it corrects the problem. My questions...does the AFM actually "go out"? Does anyone in this forum have a similar experience? Does Motorsport Auto sell a respectable AFM replacement? Any other ideas/suggestions...thanks.