Re: why the significant gas mileage difference?

nucleus wrote:
> 
> is there some sensor, that DOES NOT set a computer code, that can
> cause
> the computer to run the 94 engine richer than the 96 engine?

Yes, the O2 sensor. The main one sticking into the exhaust manifold.
Replace it on the 94 motor. O2 sensors can get "tired" without tripping
the computer code.

I replace a tired O2 on my 99 Sentra and the car came alive. The car 
felt more powerful and the gas mileage went up. The original O2 was not 
pulling any codes.

Also, the coolant temp sensor gets "tired" as well. When its faulty, it
keeps teling the computer that the engine is cold when it isn't so the
computer keeps running the car rich.


Now, which one to replace? The O2, because the bad CTS symptoms inlclude 
bad gass mileage AND the car runing a little cool. You would have 
noticed that your temp gage was sitting a little lower than normal.

CD