New ATS - Service Stabilitrak - driving jerkily
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Oh I agree, I'm confident it will get fixed, just waiting to hear it from them.
Did you say your tune was from VT? Have you talked to Brian about this?
I have made him aware, yes.
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13,061 Posts
Hi Shooter2384,
I apologize for the difficulties you are currently having with your ATS. It is good to know that the dealership is working toward a resolution of this issue. I just wanted to let you know that if you have any additional concerns during this process, feel free to PM me and we can discuss them.
Have a great day,
Austin J.
Cadillac Customer Care
Everything is good so far, thank you. They even gave me a CTS and let me give back the rental.
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You’re welcome, Shooter2384. Please keep us informed of any developments with the repairs. You know how to reach us if you need anything.
Austin J.
Cadillac Customer Care
uneven idle
There is a broken ringland or a broken piston crown on one of the pistons, besides the rough idle you may experience a loss of power but the engine will rev smoothly.
Diagnose by analyzing all of the spark plugs, performing a compression test on all cylinders, and then borescoping if the diagnostic is available.
A used oil analysis and corresponding oil filter cutaway with elevated aluminum content will also indicate this failure.
You're tripping the misfire diagnostics, evidenced by both a random misfire code and the TC light corresponding with the service stabilitrak message.
There is a broken ringland or a broken piston crown on one of the pistons, besides the rough idle you may experience a loss of power but the engine will rev smoothly.
Diagnose by analyzing all of the spark plugs, performing a compression test on all cylinders, and then borescoping if the diagnostic is available.
A used oil analysis and corresponding oil filter cutaway with elevated aluminum content will also indicate this failure.
The dealer could be right and probably is if competent (some aren't). But there are apparently more serious problems with the same symptoms.
Brian did email me back stating a hole in the piston is not related to the ring lands cracking. It's more likely the cylinder was running lean causing high crown Temps on the piston, and eventually the hole. This could be be caused by a bad injector.
Got the car back today. They replaced the fuel injector. So far so good on the original problem. Hopefully nothing piston related pops up.
We also asked them to fix a carbon fiber panel that came cracked, and a scratch that came on the center console, but they didn't get to those which wasn't great service. Will have to go back sometime for those.
We also asked them to fix a carbon fiber panel that came cracked, and a scratch that came on the center console, but they didn't get to those which wasn't great service. Will have to go back sometime for those.
I also just had this issue with my 2013 ATS 2.0 Turbo, with 8000 miles on it. Started shaking at lights, then Stabilitrak, then Engine Light. Diagnosis---- HOLE IN PISTON. Still getting fixed. Currently on the 5th day without my vehicle. Really torn on what to do. I LOVE the car!!! But, what if it happens again, or every 8000 miles??!! Fine now, because it is under warranty, but.....
2013 ATS 2.0 Turbo AWD, totally stock 25,000km (16,000m) , just got back from Dealer, new pistons and rings, piston land broken.....detonation but why? anyone know the true cause? replacing broken parts with new parts doesn't solve the problem unless new parts are different or original
cause is fixed......
cause is fixed......
Ouch. Another internal engine issue on the 2.0t. Wonder if build dates have anything to do with the failures I.e bad/defective parts during a specific run or are all these pistons really weak and we are all driving on borrowed time.
2014 CTS 3.6 Premium, 1999 Corvette,370 RWHP & other mods
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1,148 Posts
Engines with boost are very sensitive... too much timing, or too lean a fuel mixture, or too much oil ingested from the PVC, valve guides or rings, or too low an octane fuel, or too much carbon buildup can all lead to detonation. Detonation puts holes or cracks in pistons and often you can't hear it.
That's the main reason I chose the n/a 3.6 over the twin turbo Vsport with my CTS.
Bill
That's the main reason I chose the n/a 3.6 over the twin turbo Vsport with my CTS.
Bill
I'm pretty sure there were engines built with bad parts. I'm pretty sure I recall it was batches of bad rings engine bearings. There is a thread in these forums. GM did not track which cars those bad batches got used in but they did claim to have a build date range. GM actually told dealers to go out and beat the snot out of cars still on the lot that were built in that range on the theory that would cause a failure if the bad parts were used to build the engine. Clearly they felt it was cheaper to replace failed engines as they happen than to tear into ALL engines to check the parts and also deal with the unintended consequences of such tear-downs. FWIW, the dealers were not told to first follow the owners manual instructions to NOT do something like that until the prescribed break-in had been done.
I would not be surprised if many of the failures being reported were related to those bad parts or other bad batches they never caught or that GM hoped might be good enough. I was pretty amazed at the time because clearly some had been sold and others would be sold that didn't quite fail in the dealer abuse session.
On the plus side, I suspect fear of backlash means they cheerfully fix or replace failures without first analyzing who's fault the failure was.
Updated when I remembered it was bad bearings I was thinking of.
Updated when I remembered it was bad bearings I was thinking of.
Apparently from what Mike at diablosport is saying is that there is a tsb for replacement of failed piston components to a new piston design. Not sure how well that sits with me, as if all our vehicles had pistons that were not designed properly and are prone to fail then a recall or extending our engine warranty would be the right thing to do. Not for gm to only address the failed ones and then hope the warranty time or mileage surpasses before a failure occurs.
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Didn't they already get in the hot seat for knowing about defective parts and not addressing them in a timely manner.
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I would like to get a letter from gm that says " We know we used crappy parts in your engine to save money, but now to make it right we will honor engine repairs due to piston failure outside of our factory bumper to bumper warranty. "
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Didn't they already get in the hot seat for knowing about defective parts and not addressing them in a timely manner.
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I would like to get a letter from gm that says " We know we used crappy parts in your engine to save money, but now to make it right we will honor engine repairs due to piston failure outside of our factory bumper to bumper warranty. "
X2. Give us the revised Pistons please! I bought a Cadillac, not some foreign junk.
You are making some wild and unfounded accusations. Also, engines are already covered beyond the bumper to bumper warranty. Please read the warranty supplement to your owners manual.
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