[DeTomaso] FW: starter electrical system problem

[Larry - Ohio Time Corp]

Jim,

Most relays are also mechanical devices. You need to rip one open. You will
see a coil of wires that makes an electro magnet when power it applied to
it. This electro magnet will then pull down a set of contacts. The high load
of the realy is carried by the contacts. The switch that controls the relay
only carries the low load of the relay coil.

Now they do have solid state relays with no moving mechanical parts, but
that is a story for a different time.

Larry - Cleveland



-----Original Message-----
From: detomaso-bounces at poca.com [mailto:detomaso-bounces at poca.com] On Behalf
Of Pantdino
Sent: Sunday, September 22, 2013 1:30 PM
To: jeffcobb1 at me.com; boyd411 at gmail.com
Cc: detomaso at poca.com
Subject: Re: [DeTomaso] starter electrical system problem


Am I wrong or is there a confusion arising in this thread?
I'm thinking a relay has two circuits going thru it but does not do anything
mechanically.
A solenoid, when activated by it's circuit, moves something mechanically--
like engaging the starter motor on the flywheel, engaging an overdrive, etc.

The relay is on the firewall, while the solenoid is that big bump on the
starter motor. 
No?

Jim


-----Original Message-----
From: Jeff Cobb <jeffcobb1 at me.com>
To: Boyd Casey <boyd411 at gmail.com>
Cc: detomaso <detomaso at poca.com>
Sent: Sun, Sep 22, 2013 7:31 am
Subject: Re: [DeTomaso] starter electrical system problem


Hey Boyd, 
The starter will affect the solenoid and damage it, if the starter load is
too 
high.
The electrical load path must be converted into electromechanical starter 
function or heat, 
the contact arcing solenoid disc can only handle so much.
A solenoid should always be the first to replace in a starter disfunction.
Cheap and easy.

Jeff Cobb

On Sep 22, 2013, at 12:28 AM, Boyd Casey <boyd411 at gmail.com> wrote:

> I just (since may) replaced two starters and it turned out that the
problem
> was the solenoid on the fire wall was cracked and operated intermittently
.
> So I could have saved hundreds of dollars and hours of frustration for a
> part that cost around 12 bucks!
> The starter won't effect the firewall solenoid but the solenoid will
> prevent the starter from cranking.

> Boyd
> 
> On Saturday, September 21, 2013, Sean Korb wrote:
> 
>> They're so inexpensive and available you might just want to replace the
>> relay anyway.  Many  of the parts stores only carry the later style now
but
>> it's easily modified and works well.
>> 
>> sean
>> 
>> 
>> On Sat, Sep 21, 2013 at 11:23 PM, Pantdino
<pantdino at aol.com<javascript:;>>
>> wrote:
>> 
>>> 
>>> Based on the pitch of the sound and where it seems like it is coming
>> from,
>>> it really sounds like a relay on the firewall rather than anything on
the
>>> motor.
>>> 
>>> Would a starter failure cause the relay to buzz? If so, why?
>>> 
>>> Jim
>>> 
>>> 
>>> -----Original Message-----
>>> From: Pantdino <pantdino at aol.com <javascript:;>>
>>> To: MikeLDrew <MikeLDrew at aol.com <javascript:;>>; detomaso <
>> detomaso at poca.com <javascript:;>>
>>> Sent: Sat, Sep 21, 2013 2:27 pm
>>> Subject: Re: [DeTomaso] starter electrical system problem
>>> 
>>> 
>>> 
>>> I'll have to crawl under there and have someone engage the starter while
>> I
>>> listen.
>>> The good news is the car was on the lift for changing the brake fluid
>> when
>>> this
>>> happened, :-)
>>> 
>>> 
>>> 
>>> 
>>> -----Original Message-----
>>> From: MikeLDrew <MikeLDrew at aol.com <javascript:;>>
>>> To: pantdino <pantdino at aol.com <javascript:;>>; detomaso <
>> detomaso at poca.com <javascript:;>>
>>> Sent: Sat, Sep 21, 2013 2:24 pm
>>> Subject: Re: [DeTomaso] starter electrical system problem
>>> 
>>> 
>>> 
>>> In a message dated 9/21/13 14 22 8, pantdino at aol.com
<javascript:;>writes:
>>> 
>>> 
>>> 
>>> My perception is this:
>>> 
>>> When engine was shut down one piston had finished its intake stroke and
>>> was
>>> sitting at the bottom with a cylinder full of gas vapor above it.
>>> When you crank the engine the piston moves up.  Plugs fire at BTDC, no?
>>> So the
>>> plug fires before the piston is at TDC and the force of the explosion
>>> stops the
>>> piston and crankshaft at that point and the engine stops turning for a
>>> second
>>> until the starter moves the crank again.  I'm pretty sure this is what
>> has
>>> been
>>> happening, because with the ignition switched off the starter spins the
>>> engine
>>> fine.
>>> 
>>> 
>>> 
>>> 
>>>>>> Ah, an interesting theory!   If you've proven it empirically, then it
>>> becomes
>>> more than just a theory.
>>> 
>>> Your starter, however, is still a POS, and now it's a *broken* POS. :>)
>>> 
>>> Mike
> http://poca.com/mailman/listinfo/detomaso

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