elcidaviator
Member
- Joined
- August 16, 2012
- Messages
- 15
- Reaction score
- 1
- City, State
- Yokota AB, Japan
- Year, Model & Trim Level
- 2006 GTO
I have a 2013 Sport that we’ve owned since new, it has 139K on it and has began to hesitate only under full throttle or under load (going up hill 50+ mph). When at full throttle it accelerates fine in first and second but when it gets to third around 5K RPM it just sits there with stagnate RPM while it slowly accelerates. The ROM will also stutter 2-300RPM with the engine under load in 3rd-6th. I’d assume it would do the same thing if I could load the engine in first and second, but it’s difficult to put the engine under high load in those gears without it just quickly upshifting.
Troubleshooting details:
We got a CEL for a misfire on #3 cylinder when this first started happening. I replaced the spark plugs, and swapped the coils around to see if the misfire showed up on another cylinder, but I’ve never gotten a CEL since. I also drilled a small hole in the intercooler to see if it had excessive water in there and it did not help, in fact I think the car got worse after. I’ve also tried accelerating in all traction modes (sand, mud, snow…etc.) and none of them make a difference.
Maintenance details:
-All oil changes done at 5K with mobile 1 synthetic
- PTU/transmission fluid changed at 75K with Amsoil
- K&N Air filter looks good
I’m now a little lost since all the shuttering issues I’ve read about seem to be at low RPM, which indicate a PTU failure. I also don’t think it’s a turbo issue since it pulls hard in first. So is it the trans??? I’m completely lossy at this point. The car is drivable, but you can’t floor it and it’s really annoying at highway speeds uphill. I also haven’t towed with it since this came up, but I’m sure that would be a nightmare.
Thanks in advance for helping me troubleshoot this ole girl.
Troubleshooting details:
We got a CEL for a misfire on #3 cylinder when this first started happening. I replaced the spark plugs, and swapped the coils around to see if the misfire showed up on another cylinder, but I’ve never gotten a CEL since. I also drilled a small hole in the intercooler to see if it had excessive water in there and it did not help, in fact I think the car got worse after. I’ve also tried accelerating in all traction modes (sand, mud, snow…etc.) and none of them make a difference.
Maintenance details:
-All oil changes done at 5K with mobile 1 synthetic
- PTU/transmission fluid changed at 75K with Amsoil
- K&N Air filter looks good
I’m now a little lost since all the shuttering issues I’ve read about seem to be at low RPM, which indicate a PTU failure. I also don’t think it’s a turbo issue since it pulls hard in first. So is it the trans??? I’m completely lossy at this point. The car is drivable, but you can’t floor it and it’s really annoying at highway speeds uphill. I also haven’t towed with it since this came up, but I’m sure that would be a nightmare.
Thanks in advance for helping me troubleshoot this ole girl.