Need some help diagnosing a problem that started today. Have a 2014 z51 M7. Only mod is that I installed a Soler throttle controller. When traveling in gears 2 through 7 at around 1500 rpm’s, I will accelerate slightly and I feel a shudder. Kind of like going over rumble strips. I changed the transmission fluid a couple months ago with the correct fluid. Could this be bad gas? 42k miles. Always in sport mode so AFM does not activate.
Jcoulter
If you remove the throttle body, does the issue go away? If it still is an issue, it coul dbe the gas. Try a few tanks of 93-94 octane.
That's exactly what I said in post #2. Read it.
I can't imagine anyone driving an M7 in Eco Mode. All other modes for the M7 deactivate AFM.
First thing I would check is sparkplug wires. Make sure all are on tight. I have a 2016 Z06 with the Soler TC. and I have not had any issues like that.
If the shutter is harsh it could be a broken clutch spring, but this is not likely. If it was a hard miss it should throw an engine code.
Try different gas and gas station.
If the shutter is harsh it could be a broken clutch spring, but this is not likely. If it was a hard miss it should throw an engine code.
Try different gas and gas station.
Glad to help.
I now use Magnecor plug wires. They stay on better especially on the track. They also take higher temps, important if you run header pipes.
I now use Magnecor plug wires. They stay on better especially on the track. They also take higher temps, important if you run header pipes.
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