Quoting Alan Cady <acercflyer@YAHOO.COM>:
Alan,
I would:
1> Check that the fuel pressure regulator is:
   A>holding the correct pressure while running.
   B>not leaking gas into the intake manifold through the vacuum hose.
   C>Not leaking down (bad injector) when not running.
2> Check that the O2 sensor line to the ECU is not shorted.

Ken Lewis

.....>   Symptoms Jim says;
>
>
>    The motor runs like its loading up
>    We have some black smoke exiting the exhaust pipe
>    The plugs are beginning to foul out
>    A faint smell of gasoline is present in my crankcase oil
>   All of these symptoms were present before the the motor rebuild.
>
>
>    I had to change the plugs after every 400 miles
>    I got about 11 miles to the gallon in gas milage
>    It was difficult to start