Dusty
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| posted on 4/3/10 at 10:41 PM |
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If it makes a machine gun like noise, tak tak tak tak then it will commonly be down to marginal power in the battery or poor contacts in the circuit.
What can happen is there is plenty of power to move the solenoid to give the tak but this then connects the starter windings. These drop the power to
a level that no longer holds the solenoid in so it drops back, power jumps as the starter goes out of circuit, enough to operate the solenoid for
another tak and the cycle repeats rapidly like a machine gun.
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norfolkluego
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| posted on 4/3/10 at 10:53 PM |
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quote:
Originally posted by Dusty
If it makes a machine gun like noise, tak tak tak tak then it will commonly be down to marginal power in the battery or poor contacts in the circuit.
What can happen is there is plenty of power to move the solenoid to give the tak but this then connects the starter windings. These drop the power to
a level that no longer holds the solenoid in so it drops back, power jumps as the starter goes out of circuit, enough to operate the solenoid for
another tak and the cycle repeats rapidly like a machine gun.
That's exactly what's happening, got the hump with the car tonight, won't work, I'm tired, it's freezing AGAIN,
don't know what I'd do without you guys.
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DIY Si
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| posted on 5/3/10 at 09:07 AM |
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quote:
Originally posted by norfolkluego
quote:
Originally posted by Dusty
If it makes a machine gun like noise, tak tak tak tak then it will commonly be down to marginal power in the battery or poor contacts in the circuit.
What can happen is there is plenty of power to move the solenoid to give the tak but this then connects the starter windings. These drop the power to
a level that no longer holds the solenoid in so it drops back, power jumps as the starter goes out of circuit, enough to operate the solenoid for
another tak and the cycle repeats rapidly like a machine gun.
That's exactly what's happening, got the hump with the car tonight, won't work, I'm tired, it's freezing AGAIN,
don't know what I'd do without you guys.
Having owned a mini for many years, that's the sound of a low battery. As said, it's the solenoid cycling and not engaging properly. Check
all the connections and swap the battery for a newly charged one. Trying to turn an engine over can flatten a battery in no time at all if it's
been stood for a while.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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norfolkluego
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| posted on 6/3/10 at 08:46 PM |
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We finally got this sorted last night, it was down to a bad earth. It's a bit strange and we also had this problem with the Crossflow (which is
what suddenly popped up in my brain last night). Our main earth strap goes to a bolt through a chassis member, everything earthed to chassis is OK,
nothing earthed to block/bellhousing earths properly, god knows why. Solved the problem by ruuning another earth strap direct to the bell housing.
First saw this problem on the Crossflow when I moved the main earth from the chassis to the block (on the basis the the block's connected to the
chassis via the mounts so it shouldn't matter) after that we had intermittent missfires/cut outs that we eventually tracked down to the fuel
pump not earthing. Don't know why it should need two but it does.
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