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juliancw
Learner
8 Posts
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 Posted - 31 Aug 2011 : 3:08:56 PM
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Hey guys, Ive been surfing the forums to figure out the problem with my VN but seem to be getting nowhere.
My VN hasnt got a flat battery, I tested it with a multi-meter and its fine it charges and holds charge. Ive tested the alternator and thats pushing out enough volts too.
But sometimes after going for a drive the car wont start, has all the typical signs of a flat battery......20 minutes later its fine again and starts. If I can be bothered waiting, I hook up a jump starter and it kicks over straight away.
At first I thought it was the starter motor, so I changed it with a brand new one but it hasnt helped.
Hoping someone else has gone through the same and/or can give me an idea on what my next move should be!
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dryVN
Fully Licenced
228 Posts
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Posted - 31 Aug 2011 : 3:42:45 PM
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Hey Welcome to the site , The symptoms sound like an over heated CAS as i had this problem with mine.
It sounds like a sensor problem of sorts and could also maybe be a coil pack issue as that's a big area to fail when hot.
The Crank sensor is most likely though , Cheers |
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VNSVLE
Forum Moderator
1316 Posts
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Posted - 31 Aug 2011 : 7:56:34 PM
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I was thinking similar dryVN except with the jump starter hooked up it fires straight away which would not happen if it were the CAS or a coil pack.
Have you checked the voltage straight after you shut it down?? |
What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
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dryVN
Fully Licenced
228 Posts
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Posted - 31 Aug 2011 : 8:40:43 PM
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| Good point mate , Is the starter motor turning over and the motor's not firing or is there dead silence when you try and start. |
Edited by - dryVN on 31 Aug 2011 8:42:45 PM |
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juliancw
Learner
8 Posts
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Posted - 01 Sep 2011 : 12:13:10 AM
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It tries to turn over but it acts like it just hasnt got the balls, but not dead silent either its basically what you expect from a low charged battery (dash lights fade when turning the key, sounds slow and lumpy etc.)
I was told by a mate today that the battery may have a dead cell which a multi-meter doesnt pick up apparently? |
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dryVN
Fully Licenced
228 Posts
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Posted - 01 Sep 2011 : 07:10:19 AM
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| ya mate's spot on as that could be the prob , I hope that's the fix. |
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Mechknight73
National Driver
1001 Posts
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Posted - 01 Sep 2011 : 10:55:40 AM
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| I guess your simplest way to check it would be to have a battery test done. A Multimeter will tell you how many volts a battery puts out, but can't test for "load" i.e. when it has to do things like turn a starter motor. Any battery specialist can give you a free test, and they can instantly tell you if your battery really is due to be cut up for lead scrap |
Edited by - Mechknight73 on 01 Sep 2011 10:56:41 AM |
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VNSVLE
Forum Moderator
1316 Posts
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Posted - 01 Sep 2011 : 8:36:37 PM
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Testing voltage while cranking will give you a good indication of a dropped cell.
A charged battery underload (cranking) should not really drop below 10 volts 9.5 minimum.
A battery with a dropped cell will go alot lower.
Alternatively as Mechknight has mentioned take it to a battery shop or auto electrician and they should be able to let you know for sure.
Cheers |
What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
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juliancw
Learner
8 Posts
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Posted - 04 Sep 2011 : 7:43:34 PM
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I got it tested at Repco and sure enough the battery was gone. As you guys said, it had a dead cell so my multi-meter was none the wiser.
I didnt get the chance to test the load while cranking but ill be sure to remember that for the future....would of saved me a lot of time instead of all the stuffing around i did! |
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