Ok I know this topic has been covered lots before (already did a forum search) but I keep reading conflicting information. I have the flowmaster axle-backs and have removed the HC Trap. I am now considering putting it back in because for some reason it seems like there is a delay in throttle response. I'm going to try disconnecting the battery for 20 minutes as reccomended but I really don't see how that would make any difference.

I have never dynoed my car so I don't know what the before/after numbers are, but i swear it feels like I lost power after removing the HC trap. Also, I have not noticed any difference in gas mileage like some others have seen. What do you guys think? Put the trap back in or leave it out?

 

Not sure this will help but when I installed my K&N AirCharger, I put the HC in as instructed. Noticed an improved throttle response. Ran it for 1,000 miles and took the HC out, could not notice any difference except a little less MPG. Do not have Flowmasters but Magnaflow axle-backs. Put the HC back in until I get a tune since IMO its running lean. Since they have not even been using the trap since April (?) in cars, I don't think it make a difference.

 

Do the battery thing first...it make a difference, trust me. it made a world of differance with my SLP's

 

make sure and follow the owners manual for the proper proceedure for battery disconnect!

 

Is that true that the cars no longer come equipped with the trap? My only concern is having something downstream from the air filter, meaning that if the HC trap ever breaks up, it's going straight into the engine.

 

My car was built in April and had no trap. I believe that was the month that they scrapped the HC

 

It will be interesting to see if the 06's have the HC trap installed, Those of you with the Aug 8th birthdays, will have to tell us. Mines getting built on the 22nd, so I'm curious.

 

Same here... I got the "HC trap delete" feature... April build

 

Battery disconnect makes a BIG difference. My cars gas mileage is crap if I remove the trap and don't reset the computer. Once I reset though I get better gas mileage.

You must disconnect and reconnect the battery..

 

Forget the battery, get a tune and get rid of the trap...