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ourkid · Posted: Fri Nov 28, 2008 5:08 pm Post subject: Update....low cranking voltage?

From my earlier post,24hrs after fitting a new battery,my engine cranks over great but i'm only seeing 8v at gauge whilst cranking??? (engine won't fire)

I see 13.5v when running,so why is my voltage being dragged down so much?,could this be a starter problem?

Ade.
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1983 924 N/A

ourkid · Posted: Fri Nov 28, 2008 5:14 pm Post subject:

Just a thought,could someone tell me the spec (cold cranking amps)of the correct battery? (I may have been sold a dud

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1983 924 N/A

Rich H · Posted: Fri Nov 28, 2008 8:03 pm Post subject:

Could also indicate a tired solenoid or starter. I can't help as I'm on EFI and wasted spark

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1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

michi924 · Joined: 22 May 2007 Posts: 163 Location: Pontevedra, Spain

Hello. Did you check the voltage in the 15 pin at the coil?
It's normal a drop in voltage while cranking due the great amount of amps. that the starter needs.

First of all check the voltage in the coil (15) while cranking. You should get 5-8volts whit the ignition on, and 10-12v while cranking.
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Porsche 924 NA Euro.

ourkid · Posted: Sun Nov 30, 2008 6:54 am Post subject:

Fresh battery - showing 10v,dropping to 8 whilst cranking.I then noticed that the CD player facia was lighting up when cranking

So, i pulled the removeable facia off and the car fired up straight away.

At least i know the battery and ignition circuit are ok,but the wiring to the CD is obviously suspect (christmas project)

Thanks for the input!

Ade.
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1983 924 N/A