VGT Actuator Test - AlphaOBD

[TelosAlpha]

Hi everyone!

I detled my 2016 1500. Everything is fine until I started chasing an underboost issue (P0299). Using TopDon scanner tools I noticed that the VGT position called for and actual were very different and the airflow the engine should be getting is about 1/3 of whats called for.

I have managed to troubleshoot this down to needing a bi-directional rig to test. I have the paid version of Alpha and the MX+ is in the mail.

I have never done directional anything via OBD.

I want to tell the engine to try and move the VGT actuator on the top of the turbo so I can see if the thing even moves or trys to move. Hoping its:

1 - loose connector
2 - stuck actuator arm due to buildup
3 - bad actuator

Any help or guidance greatly appreciated. I have searched around for some tutorials on YT but EVERYTHING is for changing and calibrating the actuator on Cummins.

T

 

[BillySoot]

I just went thru all this. My alphOBD is how I diagnosed that it flat lined as I had no codes just the lightening bolt. Seems all the "P" codes were turned off in my STG2 tune Guess what Ram won't do? Sell just the actuator. So a complete assembly it is.
My Grand Cherokee was a bear of a job, pick ups are worse.

 

[TelosAlpha]

I still have the P0299 - so my tune isn't blocking anything.

I am pressure/smoke testing the exhaust today to see if there is a boost leak or any leaks in the downstream components.

I ran the actuator yesterday from AlphaOBD and it moved perfectly, so either the turbo is plugged up or on the way out if there are no leaks.

Either way its a turbo job, and I aint doin that!

On to the local guy who works on delted diesels LOL..

 

[BillySoot]

Good you got it to move. Test the intake flaps for movement?
Smoke testing will expose any leaks, good next step.

 

[TelosAlpha]

OK - smoke tested the exhaust (has stock muffler and delete kit straight pipe tot he turbo) and saw a small exhaust leak through a pin hole in the muffler, and a bigger leak in one of the joints.

Going to weld, tighten and do a boost leak test next.