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-   -   Car won't accelerate past 3500 RPM, violent jerking (https://www.myg37.com/forums/engine-drivetrain-and-forced-induction/279287-car-wont-accelerate-past-3500-rpm-violent-jerking.html)

Victory Oct 26, 2016 05:26 PM

Car won't accelerate past 3500 RPM, violent jerking
 
https://drive.google.com/file/d/0B1l...w?usp=drivesdk

See the video in the link. I had just driven for 30 minutes or so, then stopped and idled in park for about 10 minutes to exchange some equipment out of my trunk and chat with one of my reps. Upon leaving, the car exhibited this behavior. No CEL, feels like hitting the rev limiter. I carefully drove to where i could safely park, turned off the car off and did an ECU reset procedure, which seems to have fixed it (for now)

Any idea what's going on or what might have caused this?

G37X GraSdadow Oct 26, 2016 05:40 PM

Wow, that does not sound good at all. Glad it has been fixed.

Victory Oct 26, 2016 05:43 PM


Originally Posted by G37X GraSdadow (Post 4084546)
Wow, that does not sound good at all. Glad it has been fixed.

Not sure if it has been fixed. It seems like the car went into limp mode, but it didn't show a check engine light, so I'm lost as to why it happened.

iCrap Oct 26, 2016 06:48 PM

The only way to figure it out is going to be to plug in an OBDII reader. There should be codes there even if there is no CEL. Since you already reset the ecu it might be gone, but take it to advance/autozone and they read codes for free.

Victory Oct 26, 2016 07:03 PM


Originally Posted by iCrap (Post 4084564)
The only way to figure it out is going to be to plug in an OBDII reader. There should be codes there even if there is no CEL. Since you already reset the ecu it might be gone, but take it to advance/autozone and they read codes for free.

I have the torque app, but didn't have my bluetooth OBD2 dongle, so anything in there was lost when i reset the ECU. No choice really, needed to get on the road and wasn't going to try merging onto the expressway with that going on. I now have it in my glovebox in case there is a repeat.

What are some common reasons the car would go into limp mode?

iCrap Oct 26, 2016 09:30 PM

Oh well if you have the torque app you might as well try the read codes function, it might still be there (i doubt it though). I always leave my OBD adapter in the car, just incase. You can also reset the codes right from the app.

There are so many things which could cause limp mode, so its really hard to just make a guess.

NeverBoneStock Oct 27, 2016 02:41 AM

Blown internal gasket. 4-5 grand to fix at a dealership. Search the forum.

NeverBoneStock Oct 27, 2016 02:42 AM

My car bucked like that as well. What year is it?

empirepb48 Oct 27, 2016 07:01 AM


Originally Posted by NeverBoneStock (Post 4084630)
Blown internal gasket. 4-5 grand to fix at a dealership. Search the forum.

He has a 2013 so I don't think that's possible. Hmm, I guess that's a 2012 build date possibly so tough to say.

Rochester Oct 27, 2016 07:29 AM

Failing coilpack? Take it in for service. G'luck.

2011-G Oct 27, 2016 01:10 PM

Pop your hood and check for the sensors/plugs on your throttle body to make sure they are not loose and plugged in all the way.

You have to take the engine cover off and you will see those sensors/plugs on top of your throttle bodies.

Not sure if that's the issue but worth checking

sharkey Oct 27, 2016 01:29 PM

Sounds like a mass air flow sensor..

I know that "felt like I was hitting the Rev limiter" all too well

Victory Oct 27, 2016 04:06 PM


Originally Posted by empirepb48 (Post 4084641)
He has a 2013 so I don't think that's possible. Hmm, I guess that's a 2012 build date possibly so tough to say.

My impression was that those gaskets were redesigned in 2012 so no 2013 models had the old gaskets

Anyone know a PID so you can read oil pressure on the torque app? I assume oil pressure low enough to put the car in limp mode would at least cause a warning light.

Car has another 10k on the powertrain warranty

Victory Oct 27, 2016 04:31 PM

Well f*** me. Gasket it is.

https://cimg3.ibsrv.net/gimg/www.myg...2b746a877a.png

iCrap Oct 27, 2016 06:06 PM

aww damn that's not gonna be cheap

how many miles on the car?


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