Issues with Weapon R Intake for 1.8L

[sdesalvo00]

Hello all,

I’m super new to this forum and I’m super excited to be here! I am also not sure if I’m posting it the right spot (my apologies if I’m not!) I’m posting as I recently purchased the Weapon R Intake for my 1.8L Sonic. The install went smoothly, with little to no issues, but my car has been running poorly ever since. My cars acceleration hiccups pretty heavily between ~1800-3000rpms, but is completely smooth both before and after. I’ve uninstalled the intake, double checked every clamp/coupler, used carb cleaner to try and detect vacuum leaks, etc, but I cannot seem to find the problem. At first I noticed my MAF was seated improperly (as I didn’t actually insert it fully on one side) but I’ve since fixed that and I’ve still seen no improvement. I would also note that my idle is totally fine and I have absolutely zero other issues with the way the car runs. Any suggestions/ideas/advice would be greatly appreciated!

 

[SuperS13]

I had a Weapon R cold air intake as well, I have an Lwe flex option(egr back into intake). My cel was coming on constantly and popping a p0171 code and my 1.8L was kicking and bucking as well. The secondary issue is the intake pipe is poorly make for the 1.8L, there are rivets that the silicone hose connects to the throttle body...even if you tighten the worm clamps and adjust the silicone hose just right to make a complete seal extra air gets in. The main issue is even with a complete seal the maf can't keep up with the amount of cfm flow, also check your exhaust flex pipe if you have this code and check both o2 sensors. Anyways what I did was modify the stock intake to the max cfm the stock maf will allow. And it's best to tune the 1.8L sonic if you have extra bolt on performance goodies.