Check engine light?

Hi,

Was the engine overheating when the coolant was bubbling? If it wasn't, we may have a head gasket issue.

By chance, have you scanned the can-bus to determine what codes are present? If not, do that first.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Next, when the engine is cold, remove the radiator cap and see if coolant is forced out while it is cold. Also, place your hand over the cap location to see if there is air being forced out.

Take a look at this link. It explains how to check for a head gasket issue. I'm not saying this is the cause, but based on the description, it could be.

https://www.2carpros.com/articles/head-gasket-blown-test

Let me know.

Joe

Hi,

The code that returned, P0299 is related to low boost pressure. The ECM detects that the actual boost pressure is less than the desired boost pressure.

Here is what I suggest at this point. You should return the vehicle to the place that repaired the P0299. I suspect they left something loose, or something has come disconnected causing the low pressure and the erratic running.

Also, the idea of the bubbling coolant has me concerned especially since it wasn't overheating. Compressed air may have gotten into the cooling system at some point. They need to be aware of this happening as well.

I have two final thoughts related to the turbo issue. To replace the turbo, they had everything apart. There is a lever between the wastegate and the actuator rod that needs proper adjustment. Insufficient preload between the wastegate lever and actuator rod may allow the wastegate to open slightly when commanded closed, and result in P0299 being set.

Also, the charged air cooler connects the turbocharger to the throttle body with flexible ductwork. The tubing/ductwork requires the use of high-torque fastening clamps. The clamps can't be replaced with anything different because they can cause a leak. The clamps need to be properly tightened and positioned.

Sorry for so much technical jargon. I'm not sure who fixed it which leads me to question if the aforementioned things were recognized. You can ask them if they were done.

Let me know if I can help.

Take care,

Joe

Hi,

Absolutely, go back. They didn't fix it. LOL, If it is under warranty, it's their responsibility to get it fixed properly.

If you have a chance, let me know what you find out from them.

Take care,

Joe