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Volkswagen Jetta, Golf, GTI: 1993-1999, Cabrio 1995-2002 (A3) 98 jetta slow crank on starter


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Last Post: Dec 16, 2014 5:41 PM Last Post By: BobD
tmw

Posts: 24
Registered: 12/11/17
98 jetta slow crank on starter
Posted: Dec 15, 2014 9:32 AM
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This is a follow up to my previous post. To re-cap, I noticed my cranking speed was gradually getting slower and slower. Since my battery was old I replaced it, but then had a no start. After doing Dan's check list, I cleaned the connection of + connection at the starter and it started up. Since then the cranking speed is still slow, and very slow if it sits for a couple days. Even when it is very slow it still starts. I am wondering about the grounds. What should I be checking, and where should the neg battery wire be connected on the engine. Would a bad ground cause a slow crank? Also, would a starter that is going bad gradually cause a slow crank? The starter only has about 35K miles on it but it is probably 9 to 10 years old. The car has 125K miles on it.
Thanks
Tim
BobD

Posts: 1,844
Registered: 11/29/04
Re: 98 jetta slow crank on starter
Posted: Dec 15, 2014 5:03 PM   in response to: tmw in response to: tmw
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Ensure the ground connection is good as well. You'll see one of the ground cables going from the battery to trans/engine area.
Ensure both ends are making a good connection.

Have you tried charging the battery externally? Yes, your starter may be weak/old.... but if your alternator isn't keeping the battery up to par. Then there may be an issue there.
tmw

Posts: 24
Registered: 12/11/17
Re: 98 jetta slow crank on starter
Posted: Dec 16, 2014 9:39 AM   in response to: tmw in response to: tmw
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I followed the negative battery cable down and under the car to find that it was connected to one of the mounting bolts on the starter. The connection looked very corroded so I took it apart and sanded everything with emery cloth so it was back to bare metal. Put it back together and now the engine cranks over normally, like it used to do, before this issue.

I never realized how important the ground connections are.

Thank You. I am very happy to have my car back to normal.
BobD

Posts: 1,844
Registered: 11/29/04
Re: 98 jetta slow crank on starter
Posted: Dec 16, 2014 5:41 PM   in response to: tmw in response to: tmw
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Thats good news.

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