omega0684
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| posted on 21/7/08 at 02:13 PM |
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voltage drop on coil pack when cranking
hi guys,
im getting a voltage drop from 12v to about 3 volts on my coil pack when cranking, i have the 12v supply fed fromthe ignition feed and it also powers
the edis on the same wire, how do i stop the voltage drop?
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Mr Whippy
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| posted on 21/7/08 at 02:25 PM |
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get a new/bigger/properly charged battery?
Fame is when your old car is plastered all over the internet
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britishtrident
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| posted on 21/7/08 at 02:43 PM |
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What is the battery cranking voltage ? about 10 volts is normal, less than 9v or if it drops to 6v then rises after a couple of seconds back to 9v
to indicates and dead or gassing cell.
Also check the earths to battery are clean and good --- engine, chassis and ignition unit.
[Edited on 21/7/08 by britishtrident]
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BenB
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| posted on 21/7/08 at 03:56 PM |
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Yup. Check the battery voltage when cranking. Very much doubt it'll drop as far as 3v though because if so the starter motor would hardly go
round..
Fun fun fun!! Somethings pulling more amps than it should or causing a whole load of resistance!! Time to get out the DVM again when cranking and see
what voltages you've got at various places in the loom....
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britishtrident
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| posted on 21/7/08 at 05:43 PM |
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Might be worth stick a voltmeter between the battery negative and the cylinder block when cranking --- this is away of testing for a bad earth
connection.
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