Indy1204

I've got a 2009 5.4L and decided to try out the air box mod the other weekend and something's not right. I took the negative cable off and completed the mod using the snorkel from a 2011. The fit is exact just that it has a larger diameter intake. I waited about an hour and hooked the battery back up and went for a spin. Seems like its sucked all the power out of the motor, especially in the mid range which from what I read is where you're supposed to notice a small difference.

I've read varying threads some claiming you don't need to reset the ECU, others saying you do. I figured it couldn't hurt so I unhooked it. Nothing seems to have reset though. The clock, bluetooth, radio stations, nothing reset. Is there a way to actually reset the ECU, or could I have done something else wrong?

Thanks

gDMJoe

• no E/PCM reset is necessary.
• any power gain/loss is perceived. e.g. not real

What is real is the intake growl.
.

Indy1204

I pulled the negative again last night then switched the lights on and pumped the brakes a few times as I read in another thread. Left it for about 45 mins and plugged it back in. This time the radio reset. The next morning I followed Ford's Battery re-learn process and drove to work. At the very least it's back to normal now. Power is back. Don't really noticed much difference in the sound but I haven't had the opportunity to step on it yet.

Georgia FX4