![]() Also, at 45k miles and about a year ago, the torque converter was replaced under a TSB regarding a known trans / TC shudder issue.Īnyone had an issue with this engine and heavy carbon buildup on the valves? I'm hoping this is not the cause, but it could be. Recent repairs: Throttle position relearn (twice), both VVT actuators (due to DTC), new #3 coil pack (misfire confirmed), new crank position sensor (no DTC, just throwing parts at the symptoms). Also, at a cold start, there is a brief rattling type noise (like a loose metal shield) and the engine sometimes idles a little rough before smoothing out. The car will start right back up after it dies. Several weeks ago my daughter ran the car pretty low on gas, so thinking I may need to have the FI system cleaned next.Īnyone ever experience this or have some key insights?Īpril 26th Update: 2013 ATS 2.5L with 6-speed auto trans, 54k miles, no DTCs.Īfter the engine reaches operating temp and after a few stops, the engine will intermittently die. I don't think the fuel pump is the issue, but can't completely rule it out yet. I see no mention of a fuel filter anywhere in the owner's manual (namely the service & maintenance schedule). Car showed no codes after the coil pack replacement, but we had the rough idle and stall symptoms again today, so I'll be scanning it again tomorrow morning. Then I had a mechanic replace one coil pack on cylinder 3 based on him finding a misfire, and he also suggested replacing the plugs (even though the manual recommends plugs at 97k under severe duty). Car still had the intermittent idle and stall issue. Shortly before this issue started, I replaced both the intake and exhaust VVT actuators after getting DTC P0010 (intake side). Trans has a newer torque converter and fresh fluid with only 10k miles on it (done by reputable Caddy dealer, most of it covered by warranty). So, the extra load from the trans seems to be a factor. On a few occasions, putting the engine in neutral or park would prevent the stall. The engine will start right back up and may or may not do this at the next stop. Intermittently and when the engine is at operating temp, and when at a stop, the idle will get rough and the engine sometimes stalls.
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