This is not an isolated issue, I see this frequently on stock location inlets. Vendors sell the cheapest parts they can find, do zero testing, and then never held accountable for the damage to other parts of your car that are directly impacted and or the labor wasted trying to fix the issue they caused.
Brian from Trueform Technologies was the first to build a complete relocation inlet kit. Vendors popped up out of thin air after that selling parts they sourced from ebay to copy the inlets and capitalized on all of the people who wanted that kit, but couldn't afford to drop $1500 on a complete relocation kit, so they bought the knock off inlet kit with cheap ebay parts. To this day, that same knockoff company sells a cheap relocation kit with filters that don't flow more than 500 whp and yet they continue to sell kits because no one stands up and calls them out and if you do you get flooded with fanboy comments. They also sell turbos and started building engines which was a complete flop as they cut corners to save money every chance they could. But, the little filters create so much vacuum on the relocation inlets, it caused the car to misfire under boost because of the high side PCV off the inlet pipe was scavenging so air off the crankcase the car wouldn't run. Removed the filters and the car was able to complete a dyno pull. I'm sure the turbo are fine though.
Another item that pisses me off is the upgrade PCV valves. There is no such thing as an upgrade PCV unless you plug your head ports, delete the stock PCV and go to a real catch can solution that has a PCV valve inline from the intake manifold. And yet people think it's cool to list upgrade PCV in there mod list as if it actually means something. (
Listing upgraded PCV is a clear indication of ignorance!
) If it's not working, clean it. If you still has an issue, more than likely you have a bad flapper, cracked valve cover, or bad gasket. 15 to 18 mbar of vacuum on the crankcase at idle is what you should be testing for if your car smokes off throttle when coming to a stop. Also, for all the newbies... Stop wasting money on a high side catch can solution that does absolutely nothing. High side only discharges crankcase pressure under boost. Also, the removal of the flapper will disable the PCV system and creates nothing more than an intake vacuum leak on the intake runners which causes the car to run poorly. A low side catch can will collect all of the moisture and oil that ends up on the back of your intake valves, but you need to plug the head ports.
But... I digress... Inlets are a different issue all together and can be very costly for the consumer because a cheap parts like stock location inlets can ultimately cost you thousands of dollars in parts & labor chasing an issue that looks like a boost leak and causes turbo failure.
