Clutch pedal stuck halfway

[svinorenko]

<2000 km 2024 MT, already happened like 3-4 times, during spirited driving sessions I notice clutch pedal not fully releasing back. Even after drifting when I don't even touch the clutch at all, sometimes the pedal becomes soft afterwards and not going fully back. Then it magically heals itself after like 30 seconds.

But yesterday it became worse: I was driving normally, then wanted to do a launch start, from 4000 RPM I dropped the clutch and launched off, but the car is stuck in 1st gear, clutch pedal did not came back (only halfway), and I couldn't shift gears. This happened immediately after first hard launch during regular city cruising. Even more suspicious was that fully depressing the clutch did not do anything - car was still rolling forward as like the clutch is engaged. After I manually pulled the pedal back to me, everything became normal again. What was that? CDV is not yet removed, but there were no clutch burning smell, and it physically can't be since it happened literally after first clutch dump. The car is stock (at least powertrain related, only put coilovers)

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[itzTang]

Sounds like air in system

 

[lucky phil]

As @itzTang mentions the logical first thing to do is a system bleed and possibly check the CDV is clear but be prepared for a possible master cylinder replacement. The FocusRS Mk3's used to suffer from the exact same clutch actuation issues from time to time on some cars and it was always the Master cylinder. They would often stay fully down after a shift and by simply reaching down and manually pulling the pedal back up all would be ok again for a while.
Phil

 

[tracer bullet]

Agreeing that, though there could be a variety of causes, the simplest thing to check is if you've got a leak or obvious air in the system.

Check the reservoir over top of the brake booster, it feeds the clutch line as well. Is it low? If so, you've at least determined why. Next question will be how it got so low.

 

[Hasan]

In addition to air, leaks and CDV etc, the pedal assembly and pivot points are not great either. So it is possible that something is broken there.

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