my ecu threw a code 1... and I replace the O2 sensor... reset the ecu and such... and the check engine light came back on today with a code 1.... what is wrong

 

You might be too lean.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by awalp &raquo;</TD></TR><TR><TD CLASS="quote">my ecu threw a code 1... and I replace the O2 sensor... reset the ecu and such... and the check engine light came back on today with a code 1.... what is wrong</TD></TR></TABLE>

Its nothing to get in tension, cool down,

check the connector,
take out the plugs and check there condition, Regarding rich or lean ,

 

I spliced the connector in... but that's pretty simple... strip of the end of the wire and crimp it on the connector that came with the 02 sensor...... how would I go about checking my fuel injectors and such... I only got 25mpg... this little 1.5 should be getting better!&gt;.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by awalp &raquo;</TD></TR><TR><TD CLASS="quote">I spliced the connector in... but that's pretty simple... strip of the end of the wire and crimp it on the connector that came with the 02 sensor...... </TD></TR></TABLE>

. You need to solder that shiznit and put heat shrink around it. A simple crimp-style connector isn't going to make the best connection, hence your ECU still getting a bad signal. Try redoing the wiring and I bet it solves your problem.