I got a rebuilt ECU from NAPA but it only lasted about ten minutes of running good then all hell broke loose and it ran twice as bad, way to much fuel catalytic glowing backfiring etc.. Exchanged it and the second one has been working great for a couple of years. The (new) rebuilt one failing right out of the box sent me down the wrong road for a couple of days of checking sensors and what not so keep that in mind if anyone runs into similar problems.
