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Hey guys you all have helped me in the past, and i think you guys will be able to answer this as well! my 2015 mustang ecoboost has just recently been tuned, it pulls harder but when i give it hard gas at 4500 rpm's it backfires out the exhaust and lacks acceleration,i think my spark plugs are...

after my upr dual valve catch can install and gutting my pcv, i keep getting a p04db code that goes on and off, all fittings are okay, what could it be, if i install a new pcv plate w the check valve will the code stop happening? need help

just installed my UPR dual valve catch can and gutted my PCV due to smoke issue, car runs way better, but this p04DB code keeps popping on an them clearing itself for a couple drives then comes on again when i give it hard throttle, what could it be??

So you guys have been helping me a lot with my car, and i need your guys help again, so i have a catted downpipe, and i fixed my cel that was because of my 02 sensors, and i just recently installed a UPR catch can, everything hooked up right, car runs way better and no more smoke, now i'm...

so i just put a cvfab catted downpipe on my car and installed a defouler to help with my CEL, and it didn't come off, my mechanics says i need to get a new sensor and that the defouler is fine, how do i know it's not just the defouler placement or not???

I have a 2015 Mustang ecoboost, intake, borla catback, catless downpipe installed 3 months ago, been getting this smoke and oil smell at start up, not everytime but it's a lot when it does, mostly on warm starts after sitting a while, i have a upr dual valve cc on the way, should that help my...

So i am farley new to the whole car scene, i have a 2015 Ecoboost with 70k miles, i have a borla catback exhaust and catless downpipe, no tune yet, car runs perfectly fine but i notice occasionally when idling smoke comes out my exhaust, some times pretty thick! it goes away after a minute but...