i had install AEM CAI, and i feel the car gain some power. after that, i installed new B&B exhaust, but i feel the car loss lots of power due to the new exhaust. the rmp increase so slow. anyone can help me? Thanks

 

have you checked if your butt-dyno is properly calibrated? Sounds a little off...

 

can i just reset ECU? im new here, so i do not know about the butt-dyno.

 

you can reset the ecu by unplugging the battery for a few min.
You can also reset the NVRAM by doing the 20 brake pedal procedure (search for it).

 

Thanks, i will try tomorrow. how about if it still doesnt work? what should i do next.

 

http://lmgtfy.com/?q=site%3Arx8club....+loss+of+power

 

i reset ECU today, and the power is back, but the new problem is the idle bacome unstable when braking, up and down between 1000-500 rpm, i do some search, i think on one has the same problem with mine.

 

your idle is unstable due to resetting the ecu. The fuel trims will need to be relearned, and this will take about 4-6 drive cycles

your searching needs to improve...

 

How long were you running your car with the intake and before changing out the exhaust?

Did you check the exhaust for obstructions before the install?