2019 Stinger GT2 cutting out/ acceleration interruption

[stinger_2019GT2]

Hi all, new to the stinger world. Just bought my 2019 Stinger GT2 AWD 3.3T with 58k miles. Had the car for about 45 days when I started noticing a change of power when accelerating. Low RPM/ normal driving the car runs amazing. When I really step on the gas the car jolts/ skips/ and cant reach full boost. I did have the car serviced for new oil pressure sensor, one new coil and all new spark plugs hopping this would resolve the issue. I still am experiencing the jolt/ skipping/ popping/ power cutting out feeling when accelerating. I currently have the car back in the shop getting a diagnosed. I have read on here it could be a fuel pump issue or an ECU issue. The car does have: Oil catch can, upgraded intercooler and intercooler piping, cold air intakes, blow off valve and borla exhaust system. My theory is that the car is in- properly tuned. Reached out to KDM tuners to see what they have to say. I am looking for any helpful hints / suggestions to get this issue fixed so I can enjoy the car fully.

 

[kuraksi]

Hi all, new to the stinger world. Just bought my 2019 Stinger GT2 AWD 3.3T with 58k miles. Had the car for about 45 days when I started noticing a change of power when accelerating. Low RPM/ normal driving the car runs amazing. When I really step on the gas the car jolts/ skips/ and cant reach full boost. I did have the car serviced for new oil pressure sensor, one new coil and all new spark plugs hopping this would resolve the issue. I still am experiencing the jolt/ skipping/ popping/ power cutting out feeling when accelerating. I currently have the car back in the shop getting a diagnosed. I have read on here it could be a fuel pump issue or an ECU issue. The car does have: Oil catch can, upgraded intercooler and intercooler piping, cold air intakes, blow off valve and borla exhaust system. My theory is that the car is in- properly tuned. Reached out to KDM tuners to see what they have to say. I am looking for any helpful hints / suggestions to get this issue fixed so I can enjoy the car fully.








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Sounds frustrating — especially after just getting the car. Given the mods, I’d agree tuning is a strong suspect. The jolting under boost sounds like fuel delivery or spark issues — maybe the upgraded parts are pushing beyond what the stock tune can handle.


You’re right to reach out to KDM tuners. If the car isn’t tuned properly for the intercooler/intake changes, it can definitely cause boost/fueling issues. I'd also ask the shop to check for any codes (even pending ones), boost leaks, and fuel pressure under load.


Hopefully it’s just a tune mismatch and nothing too deep. Let us know what the shop or tuner says.