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Blog Post: Continued Torque Management Advance, Spark plugs and Charge Cooler


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Today’s scan showed torque management advance on both runs despite the changes in the tune to try to address it. I also have some misfires on cylinder 3, and the Manifold air temperature is not steadily dropping during WOT.

The misfires mean it is time to change the sparkplugs, regapping to a smaller gap due to the increased boost. The ATS-V LF4 is quite busy on top, so I will need to remove several things to get to the on-plug coil packs and plugs, but hopefully I can get that done soon.

The MAT trend means the charge cooler wants to be bled/vented again. I did that this morning, but will revisit a couple of times to try to ensure all the air in the system is replaced by new Dexcool coolant. I am surprised it needed doing again so soon, but I suspect in the heat the system expands and gulps in air now and then.

E3AWOT2-Capture-1024x765.png

The continued TMA means that the changes in the tune for today were not successful, and back to the drawing board to try to sort out why I am getting TMA there, or simply table it for now. As I like to say, it bears more study. I plan to revert to the prior tune since today’s changes were not successful in addressing the TMA.

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Bruce

2016 Cadillac ATS-V gray/black

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