weird battery problem

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Anonymous - 27 Apr 2005 04:09 GMT

Hey, I really cant understand whats going on here. I have 1996 Saturn
SL2 with after factory alarm and Stereo.

I drive the car 25 miles. Stop it....30 minutes later the car wont
start. ( i can hear the starter turn).

I eventually need to get a jump.

BUT....if I leave it overnight....i am able to start the car with no
problems.

I took it to the dealer last weekend, and after running all their
diagnostics, they say the battery is testing fine.

So it seems that after a small break(after a long drive 20+ miles) the
car wont start...but waiting over night the car starts.

But after a short drive the car starts after a short break.

Gosh this is so weird....the dealer couldnt reproduce my problem and
so i was out $95.

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Scott Buchanan - 27 Apr 2005 06:02 GMT

when you say you can hear the starter turn, it cranking normally or spinning
with out cranking?

> Hey, I really cant understand whats going on here. I have 1996 Saturn
> SL2 with after factory alarm and Stereo.
[quoted text clipped - 22 lines]
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nitpik - 28 Apr 2005 14:27 GMT

Yup, it's not likely the battery. It sounds like the ignition module or
some important sensor like the engine temperature sensor is giving false
information to the main computer after it gets warmed up good. You need to
plug the car into a computer and drive it till it's hot and watch the sensor
input readings to find out which one is not reading correctly when the
engine gets hot.

So for instance, if it's the engine temp sensor telling the computer that
the engine is cold when it is actually hot, then the air/fuel mix will be
way wrong and the car won't start.

> Hey, I really cant understand whats going on here. I have 1996 Saturn
> SL2 with after factory alarm and Stereo.
[quoted text clipped - 17 lines]
> Gosh this is so weird....the dealer couldnt reproduce my problem and
> so i was out $95.

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fmbike - 05 May 2005 04:07 GMT

> Hey, I really cant understand whats going on here. I have
> 1996 Saturn SL2 with after factory alarm and Stereo.
[quoted text clipped - 18 lines]
> Gosh this is so weird....the dealer couldnt reproduce my
> problem and so i was out $95.

Hello.

I’m having the exact same symptom.

Has anybody found the solution to this.

Thanks in advance for any replies/help,

Frank

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Dick C - 13 May 2005 14:49 GMT

Anonymous wrote in alt.autos

> Hey, I really cant understand whats going on here. I have 1996 Saturn
> SL2 with after factory alarm and Stereo.
[quoted text clipped - 9 lines]
> I took it to the dealer last weekend, and after running all their
> diagnostics, they say the battery is testing fine.

Sorry for coming in so late, but I haven't read the group for a while.
First of all, if the starter is turning the engine over, the battery
is good enough to start the car.
However, since your problem only occurs after the car has warmed up,
and goes away after it has cooled off a bit, then you have a heat
related problem. Next time it happens, you need to check for spark
and gas. A quick way to check is to spray a bit of starter fluid into
the intake, if the car starts then dies, you need a fuel pump, if it
doesn't start your ignition system is dying from heat.

> So it seems that after a small break(after a long drive 20+ miles) the
> car wont start...but waiting over night the car starts.
[quoted text clipped - 3 lines]
> Gosh this is so weird....the dealer couldnt reproduce my problem and
> so i was out $95.

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Dick #1349
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