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2019 manual bogging when shifting.

Turian

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2021 Mustang Mach 1 6 speed manual.
When I shift at 6700 or less, I let off the gas, kick the clutch and shift from 2nd, 3rd, to 4th gear, back on the gas, zero issues.

Repeat the above, only at 7000 rpms, engine rpms drop, bogs at around 6000 for what feels like two seconds at least, then starts to make power again.

I have tested normal mode, sport mode, track mode and drag mode. All modes with advance track and traction control off and with them on. Same results either way. Stay under 7k, all good, go over 7k engine just spins like the clutch isn't engaging. Tested the clutch, it grabs good. Please help?
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Toydoctor

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Ryan
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2018 Ford Mustang
When I shift at 6700 or less, I let off the gas, kick the clutch and shift from 2nd, 3rd, to 4th gear, back on the gas, zero issues.

Repeat the above, only at 7000 rpms, engine rpms drop, bogs at around 6000 for what feels like two seconds at least, then starts to make power again.

I have tested normal mode, sport mode, track mode and drag mode. All modes with advance track and traction control off and with them on. Same results either way. Stay under 7k, all good, go over 7k engine just spins like the clutch isn't engaging. Tested the clutch, it grabs good. Please help?
You are hitting the soft rev limiter which starts at about 7100 rpm then closes the throttle plate at 7200. Completely normal. I had the same problem at the drag strip until I data logged it. For an example it’s pointless to flat shift. When you try to re engage the clutch on a upshift it takes about .5 to .75 of a second for the throttle plate to reopen. I had a truck that I tuned to kill spark on upshifts so I could flat shift (or power shift) at the drag strip.

Kind of sucks, but seems like most aftermarket tuners remove the soft and setup a hard limiter with either fuel or ignition cutouts. But I’m speculating I don’t know for sure.
 
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Turian

Turian

Well-Known Member
Joined
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Conway AR
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Aaron
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2021 Mustang Mach 1 6 speed manual.
You are hitting the soft rev limiter which starts at about 7100 rpm then closes the throttle plate at 7200. Completely normal. I had the same problem at the drag strip until I data logged it. For an example it’s pointless to flat shift. When you try to re engage the clutch on a upshift it takes about .5 to .75 of a second for the throttle plate to reopen. I had a truck that I tuned to kill spark on upshifts so I could flat shift (or power shift) at the drag strip.

Kind of sucks, but seems like most aftermarket tuners remove the soft and setup a hard limiter with either fuel or ignition cutouts. But I’m speculating I don’t know for sure.

I figured it was something like that. I have been driving manuals for 25 years, mostly mustangs, and never experienced this. These new cars have so many safety features.
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