Nkreig's K16 Geartronic Build by nkreig

3 minute(s) of a 105 minute read

Today I woke up to some messages from the shop that did my k16 swap saying they tried the stock injectors and a few other things trying to sort out why my car won't idle right and misfires. They could not find a solution. We have replaced all the sensors but the fps. So, I'm racking my brain thinking what could be going on here! It ran fine before the swap so what is the issue!! Then after reading some stuff in older post about rough idle I found a thread of Kruno's talking about the check valve adapter and I thought to myself...the last time I looked under my car the O2 bung looked as thought it had the check valve adapter on it. I should have not second guessed myself and asked the shop how they connected the check valve. Well, the car is at the shop and I can't verify if it was the adapter until Thursday when they reopen. So, i walk downstairs and open the box with the old turbo and WTF!!? the check valve is still in the old turbo!!!! Thursday some heads are gonna roll! I hope this solves my problems once and for all.

12-25-2013

Throttle body was cleaned with the swap and the MAF sensor is new. This is an easy part to overlook. I think the guys just thought the check valve adapter was an o2 bung extender for the cat and when they tried to install the check valve I bet they saw the threads were different for k16. I'm sure they just thought it was a simple nipple connection and put a different connector on instead of a valve. Easy mistake. I read other threads of this valve failing and it causes the same symptoms as my problem. We will see if this is the end of my problems. Lol

12-26-2013

The check valve is connected to the intake side of the turbo and routes to down by the lower intake plenum close to cylinder 1 and 2 on all t5 engines. The check valve allows air to go into the intake path through the valve but a little ball blocks the air if it try's to go the other direction. Since mine was not on it was presenting the same symptoms as am air leak between the MAF and throttle body. I found the problem only by chance because it would never b discovered with a leak test. The valve threading is different between the ko4 and the K16 and requires an adapter that comes with the Elevate kit. Some have changed the threaded section out with the focus check valve. This requires a special tool or a beer can in Maddens case! Lol. The fact that I went down and looked my old turbo over and discovered the check valve still in it was truly a Christmas miracle for all who believe!