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Used Porsche and Prestige Cars For Sale | Harbour Cars

Slow Cranking

Aghh ok so this is not necessarily a slow crank but a possible slow to fire up .

If you can .. do a sound clip or a video please so i can confirm if its poor start or slow cranking .. i dont really want to tell you to replace a starter motor when the fault is actually something else .

2 seconds sounds about right but a video will tell me a lot .

Bear in mind when i normally fix cars i have them in front of me :D
 
deMort said:
Aghh ok so this is not necessarily a slow crank but a possible slow to fire up .

If you can .. do a sound clip or a video please so i can confirm if its poor start or slow cranking .. i dont really want to tell you to replace a starter motor when the fault is actually something else .

2 seconds sounds about right but a video will tell me a lot .

Bear in mind when i normally fix cars i have them in front of me :D
Click to expand...

Really appreciate that deMort, cheers pal.

Unfortunately I won't have access to the car for a while now so can I post back in a week or two :thumb:
 
There doesn't seem to be a lot of diagnosis going on here. You have a volt meter, have you looked at the following during cranking:

Battery voltage
Voltage between battery - and starter motor -
Voltage between battery + and starter motor +


I would do it by pulling the fuel pump fuse so that I can run it for a good few seconds to get readings. All of this talk of issues with earth or power straps could be confirmed by the above tests. If you are getting a good battery voltage and that voltage is present at the starter motor then it is a motor fault.
If you are seeing significant voltage drops on either the - or the + side then you can further check, such as the voltage from the chassis to the battery - terminal.

I know that slow starter motors are an issue on some models of BMW, so it isn't unheard of.


MC
 
I've just got round to fixing mine properly. I decided to change the alternator to starter cable, which also carries the starter solenoid feed. i was getting some clicking from the solenoid so it pointed to this. It was pretty green and corroded looking. I put a new starter in for good measure, and it now cranks very quickly, hot or cold.

M
 
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