so my 95 now has a 97 LT1. I just got it back Tuesday and took it to the track last night. It slowed down almost a whole second from my old motor. I got 11 MPG!!! And it just doesn't want to launch. 60' was off by .3

Any ideas of what could be causing this??

 

Did you swap the knock sensor back to a OBD 1 sensor or are you using the OBD 2. Is the checck engine light on?

 

yes the SES light is on, and it was on before I even did the swap.

And I used th knock sensor from my old engine because i was told too on this site. And now Im being told that my computer could be the problem because its OBD1...I dont know...