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  #1 (permalink)  
Old 05 Oct 2010, 10:19 am
SMcK
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Default Main Relay Probs when Cold?


My '92 Acura fails to start sometimes. It will work fine for days,
then one day it will crank but not start. Later, it will start fine.
Research suggests a main relay problem except for one thing: this
problem seems to have nothing to do with the heat. The first time it
happened was in late summer when the day was warm but cooler than it
had been in a couple weeks (Washington DC summer). The second time
was in the morning of a warm but not particularly hot day. Yesterday
it was cold and rainy. There have been times when it's been far more
hot and I haven't had a problem. All the "bad relay" information
suggests this is a hot weather problem.

Should I pursue the bad realy diagnosis anyway? Any other
suggestions?

Thanks,
-Scott
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  #2 (permalink)  
Old 05 Oct 2010, 10:41 am
jim beam
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Default Re: Main Relay Probs when Cold?

On 10/05/2010 08:19 AM, SMcK wrote:
>
> My '92 Acura fails to start sometimes. It will work fine for days,
> then one day it will crank but not start. Later, it will start fine.
> Research suggests a main relay problem except for one thing: this
> problem seems to have nothing to do with the heat. The first time it
> happened was in late summer when the day was warm but cooler than it
> had been in a couple weeks (Washington DC summer). The second time
> was in the morning of a warm but not particularly hot day. Yesterday
> it was cold and rainy. There have been times when it's been far more
> hot and I haven't had a problem. All the "bad relay" information
> suggests this is a hot weather problem.
>
> Should I pursue the bad realy diagnosis anyway? Any other
> suggestions?
>
> Thanks,
> -Scott


yes, pursue the relay anyway. hot weather syndrome is really at early
onset. once "matured", this problem can occur at pretty much any time.

if you've done your homework, and it sounds like you have, you'll know
what you're looking for if you take the relay out and pop the cover off.
re-soldering or replacing a relay of your vintage is a wise precaution
in my opinion, regardless of whether it's the culprit. if you do that
and the problem persists, you'll have a much clearer path to diagnosis.

fyi, it's better to de-solder before re-soldering. when solder cracks
and there is internal sparking, oxides form which remain in position
even if you re-solder and it weaken the joint. removing all the old
solder also gets rid of this crud allowing a full fresh joint to be made
that should give you another 18 years service. or just buy a new relay.


--
nomina rutrum rutrum
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  #3 (permalink)  
Old 05 Oct 2010, 05:11 pm
SMcK
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Posts: n/a
Default Re: Main Relay Probs when Cold?

On Oct 5, 11:41*am, jim beam <m...@privacy.net> wrote:
> On 10/05/2010 08:19 AM, SMcK wrote:
>
>
>
>
>
>
>
> > My '92 Acura fails to start sometimes. *It will work fine for days,
> > then one day it will crank but not start. *Later, it will start fine.
> > Research suggests a main relay problem except for one thing: this
> > problem seems to have nothing to do with the heat. *The first time it
> > happened was in late summer when the day was warm but cooler than it
> > had been in a couple weeks (Washington DC summer). *The second time
> > was in the morning of a warm but not particularly hot day. *Yesterday
> > it was cold and rainy. *There have been times when it's been far more
> > hot and I haven't had a problem. *All the "bad relay" information
> > suggests this is a hot weather problem.

>
> > Should I pursue the bad realy diagnosis anyway? *Any other
> > suggestions?

>
> > Thanks,
> > -Scott

>
> yes, pursue the relay anyway. *hot weather syndrome is really at early
> onset. *once "matured", this problem can occur at pretty much any time.
>
> if you've done your homework, and it sounds like you have, you'll know
> what you're looking for if you take the relay out and pop the cover off.
> * re-soldering or replacing a relay of your vintage is a wise precaution
> in my opinion, regardless of whether it's the culprit. *if you do that
> and the problem persists, you'll have a much clearer path to diagnosis.
>
> fyi, it's better to de-solder before re-soldering. *when solder cracks
> and there is internal sparking, oxides form which remain in position
> even if you re-solder and it weaken the joint. *removing all the old
> solder also gets rid of this crud allowing a full fresh joint to be made
> that should give you another 18 years service. *or just buy a new relay..
>
> --
> nomina rutrum rutrum- Hide quoted text -
>
> - Show quoted text -



Just realized that I typed Acura when I meant Accord. I'm not sure
that makes a difference when it comes to this particulr answer.

-Scott
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  #4 (permalink)  
Old 05 Oct 2010, 05:30 pm
jim beam
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Posts: n/a
Default Re: Main Relay Probs when Cold?

On 10/05/2010 03:11 PM, SMcK wrote:
> On Oct 5, 11:41�am, jim beam<m...@privacy.net> wrote:
>> On 10/05/2010 08:19 AM, SMcK wrote:
>>
>>
>>
>>
>>
>>
>>
>>> My '92 Acura fails to start sometimes. �It will work fine for days,
>>> then one day it will crank but not start. �Later, it will start fine.
>>> Research suggests a main relay problem except for one thing: this
>>> problem seems to have nothing to do with the heat. �The first time it
>>> happened was in late summer when the day was warm but cooler than it
>>> had been in a couple weeks (Washington DC summer). �The second time
>>> was in the morning of a warm but not particularly hot day. �Yesterday
>>> it was cold and rainy. �There have been times when it's been far more
>>> hot and I haven't had a problem. �All the "bad relay" information
>>> suggests this is a hot weather problem.

>>
>>> Should I pursue the bad realy diagnosis anyway? �Any other
>>> suggestions?

>>
>>> Thanks,
>>> -Scott

>>
>> yes, pursue the relay anyway. �hot weather syndrome is really at early
>> onset. �once "matured", this problem can occur at pretty much any time.
>>
>> if you've done your homework, and it sounds like you have, you'll know
>> what you're looking for if you take the relay out and pop the cover off.
>> � re-soldering or replacing a relay of your vintage is a wise precaution
>> in my opinion, regardless of whether it's the culprit. �if you do that
>> and the problem persists, you'll have a much clearer path to diagnosis.
>>
>> fyi, it's better to de-solder before re-soldering. �when solder cracks
>> and there is internal sparking, oxides form which remain in position
>> even if you re-solder and it weaken the joint. �removing all the old
>> solder also gets rid of this crud allowing a full fresh joint to be made
>> that should give you another 18 years service. �or just buy a new relay.
>>
>> --
>> nomina rutrum rutrum- Hide quoted text -
>>
>> - Show quoted text -

>
>
> Just realized that I typed Acura when I meant Accord. I'm not sure
> that makes a difference when it comes to this particulr answer.
>
> -Scott


nope!



--
nomina rutrum rutrum
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