Hello all,
I have recently purchased a 2009 si. The last owner had some fun cutting up the engine harness. Car was running before but was breaking up badly around 3k rpms and then again around 6k rpms. When swapping the engine harness I had to improvise and make a few sensor connectors. Should all be wired well. Since I have changed the harness the car will start and then stall. When I remove the trans sensor on the front of the transmission the car will start but revs high and rpm’s fluctuate.

anybody experience something similar? Could really use the help

 

Is the replacement harness off an 09 si as well?
Why did you need to improvise certain connectors?

I would check the pins on the connectors make sure their in the right slot, if you got an identical harness it shouldn’t be an issue but if you messed with the connectors pins might be misplaced.