05 g35 coupe 6mt bucking at 4,000 rpm

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Dec 23, 2018 | 07:29 AM
  #1  
The g is bucking like mad at around 4,000rpm WOT. I have read a few threads that do not seem to explain the same issue. A few have vids uploaded that are definitely not what's going on here. She starts up fine, idles great. If I throttle steady thru a gear, she's good. If I'm in neutral or clutch in she revs fine. If I break traction(burnout) she revs right thru to the rev limiter. It appears she doesn't like being under full load, WOT. When she "bucks" (best I can describe) it's as if I'm pumping the throttle.
NO SVC ENGINE LIGHT ON
As far as i know she's bone stock.
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Dec 23, 2018 | 07:43 AM
  #2  
Quote: The g is bucking like mad at around 4,000rpm WOT. I have read a few threads that do not seem to explain the same issue. A few have vids uploaded that are definitely not what's going on here. She starts up fine, idles great. If I throttle steady thru a gear, she's good. If I'm in neutral or clutch in she revs fine. If I break traction(burnout) she revs right thru to the rev limiter. It appears she doesn't like being under full load, WOT. When she "bucks" (best I can describe) it's as if I'm pumping the throttle.
NO SVC ENGINE LIGHT ON
As far as i know she's bone stock.
I think your vehicle is trying to prevent you from mass destruction?

Telcoman
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Dec 23, 2018 | 11:37 AM
  #3  
Could be a few things but I'd start by looking for an electrical short, the engine torques a little in the engine bay and it could be breaking contact in some connection. With the engine at idle start wiggling EVERYTHING and see if it stalls the motor. Next thing to do would be start logging data with an OBD2 scanner, something like Torque Pro app for android would work as well. Reproduce the issue while you go through logging various sensors and see if something is sending a wild or dropped signal.
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