Chad G wrote:

> What causes an engine to just start to run rich?? I recently replace my
> plugs and checked them today....they were almost black with soot. The old
> plugs that I replaced were the "proper colour."   My gas mileage is crap
> eventhough I replaced the plugs, wires, fuel pressure regulator, thermostat,
> water pump, distributor, rotor, air filter, cleaned the FI ground
> wires.............I'm stumped.
> help!!!!!!!!!!
>
> Chad 85GL

Temp sensor?    O2 sensor?