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Pontiac Montana cranks slowly


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schja
New User

Jun 2, 2013, 5:15 PM

Post #1 of 7 (1077 views)
Pontiac Montana cranks slowly Sign In

Hi, I have a 2003 Pontiac Montana with around 120,000 miles on it. In the last two days it started cranking very slowly. I have put a new battery in it but it still cranks slowly. Any ideas of how I should proceed?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 2, 2013, 5:40 PM

Post #2 of 7 (1065 views)
Re: Pontiac Montana cranks slowly Sign In

Measuring the starter current draw should be the next step.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



schja
New User

Jun 2, 2013, 5:43 PM

Post #3 of 7 (1061 views)
Re: Pontiac Montana cranks slowly Sign In

How would I go about doing that?


Hammer Time
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Jun 2, 2013, 5:46 PM

Post #4 of 7 (1056 views)
Re: Pontiac Montana cranks slowly Sign In

You will need a digital voltmeter with with a high amp probe.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



schja
New User

Jun 2, 2013, 6:07 PM

Post #5 of 7 (1052 views)
Re: Pontiac Montana cranks slowly Sign In

Okay,, Got a digital voltmeter but I'm not sure about the high end prob... I'll have to check that out. Thank you.


Hammer Time
Ultimate Carjunky / Moderator
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Jun 2, 2013, 6:15 PM

Post #6 of 7 (1043 views)
Re: Pontiac Montana cranks slowly Sign In

High amp probe, not high end



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
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Jun 3, 2013, 4:44 PM

Post #7 of 7 (1021 views)
Re: Pontiac Montana cranks slowly Sign In

Don't use the amp scale and amp lead position to measure current draw with your meter. Don't think the fuse can take it.

You need an inductive amperage clamp to measure the vast amounts of current that a starter motor uses as HT stated.


Other than that you can do a voltage drop check on the battery cables to see if you have high resistance in the cabling causing your slow starter.

http://www.freeasestudyguides.com/voltage-drop-test.html





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(This post was edited by Discretesignals on Jun 3, 2013, 4:44 PM)






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