All Things Mk5 > How to Guides / Troubleshooting

Sudden loss of power/misfiring around 3500rpm

(1/1)

hegemon:
Any idea what this might be caused by?

No fault codes logged, annoyingly.

https://www.dropbox.com/s/fvhqkipgs3vguii/Video%2027-08-2015%2018%2001%2037.mov?dl=0

It definitely seems worse under load.

john87:
My money would be on a failing coil pack or packs.. misfiring under load is usually caused by this.

hegemon:
Turns out to have been the crank speed sensor. I got it to throw up an "Implausible signal" fault code by revving the engine fairly aggressively a few times with the engine out of gear. I'm sure my neighbours understand.

New sensor and fitting worked out to be around £200.

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