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Laurens #363488 12/05/16 10:37 AM
Joined: Apr 2013
Posts: 206
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HI Laurens,
did you press the black button?
The "accident switch" could be activated after a strong ride or a "hit".
Just press it and find out if the M3W starts after it.

Sorry i have only a picture of the part from my ARP4 (my M3W is on service)
The black part with the soft surface in the middle of the picture - the same part in M3W...
Good luck - Thorsten


Last edited by Thorsten; 12/05/16 10:40 AM.

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Thorsten #363496 12/05/16 11:26 AM
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Originally Posted By Thorsten
HI Laurens,
did you press the black button?
The "accident switch" could be activated after a strong ride or a "hit".
Just press it and find out if the M3W starts after it.

Sorry i have only a picture of the part from my ARP4 (my M3W is on service)
The black part with the soft surface in the middle of the picture - the same part in M3W...
Good luck - Thorsten


It's the inertia cut-off switch and on the M3W is in front of the battery on the right hand side partially under the oil tank. Press the rubber top and if you hear and feel a click that's probably the issue.



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Laurens #363597 12/05/16 07:17 PM
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I NOW carry an extra fuel pump. Never leave home without it, Also carry a Harley rectifier and enough tools to do the install on both

hbatts #363599 12/05/16 07:25 PM
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FUEL PUMP & RECTIFIER! I hope for long trips only. not whenever you take it out for a spin

Q8morgan #369184 06/06/16 11:01 PM
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Today same problem again. Didn't start. No fuel pump sound.
After 10 minutes the pump suddenly run again.
Went home, switched the engine off once during the trip ( no problem to start ) when home switched off the engine and try to start again but no fuel pump sound, so couldn't start. After half hour without touching the car still no fuel pump. I left the car without touching or move it. Waited one hour more, turn on key and the pump was running again. Uhhhhhh.
What can make this problem ??


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Laurens #369185 06/06/16 11:09 PM
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Check the wires, but as you said at times i guess the fuel pump is going.

Laurens #369186 06/06/16 11:17 PM
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First of all get the fuel pump pressure checked. Should be about 58psi...mine was 10psi

My fuel pump also had a loose connection on the pump - within the fuel tank. Might be worth removing the pump and having a look if the pressure is ok. There are good descriptions of how to remove a pump on here

If all ok I would get the ECU checked

Laurens #369199 07/06/16 05:07 AM
Joined: Feb 2016
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Went home, switched the engine off once during the trip ( no problem to start ) when home switched off the engine and try to start again but no fuel pump sound, so couldn't start. After half hour without touching the car still no fuel pump. I left the car without touching or move it. Waited one hour more, turn on key and the pump was running again"

Had the same problem , turned out to be a bad earth on the earthing bar located behind the seat back (2012 version) made good since then no problem.you could try putting another earth on the pump to see if that clears it.

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