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Old 09-17-2008, 05:32 PM
JeffK
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Default Does the fuel pump have to work to engage the starter?

Hi all,
I have a 2000 outback, 2.5L. For the past month or so its had a
problem getting steadily worse - first thing in the morning when I
turn the key it only makes a "click" - the starter doesn't turn at
all. After about 10 key turns the starter finally engages, it starts
fine, and is usually fine the rest of the day. The battery voltage is
good.

Its in the shop now, and the guy is telling me he thinks it is the
fuel pump. Is that possible? Would a lack of fuel pressure disengage
the starter? My experience with cars is with older volkswagens where
the starter and fuel pump circuits are independent - a bad fuel pump
would still let the starter turn.

Thanks for any help.

cheers,
Jeff
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  #2 (permalink)  
Old 09-17-2008, 09:37 PM
johninKY
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Default Re: Does the fuel pump have to work to engage the starter?

I would focus on the starter solenoid.

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Old 09-17-2008, 09:37 PM
Bugalugs
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Default Re: Does the fuel pump have to work to engage the starter?

JeffK wrote:
> Hi all,
> I have a 2000 outback, 2.5L. For the past month or so its had a
> problem getting steadily worse - first thing in the morning when I
> turn the key it only makes a "click" - the starter doesn't turn at
> all. After about 10 key turns the starter finally engages, it starts
> fine, and is usually fine the rest of the day. The battery voltage is
> good.
>
> Its in the shop now, and the guy is telling me he thinks it is the
> fuel pump. Is that possible? Would a lack of fuel pressure disengage
> the starter? My experience with cars is with older volkswagens where
> the starter and fuel pump circuits are independent - a bad fuel pump
> would still let the starter turn.
>
> Thanks for any help.
>
> cheers,
> Jeff


My experience with the symtems you describe has be a problem
with a buildup of crud between the battery terminals and the
attachment of the cables. There is enough contact for a
small amount of current to flow but when the higher drain of
a starter is just too much. Cleaning the terminals and
re-tightening the cables solved the problem. If it happens
somewhere inconvenient just attempting to gently twist the
cables on the terminal post is usually enough to get you home.
YMMV
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Old 09-17-2008, 10:35 PM
Bugalugs
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Default Re: Does the fuel pump have to work to engage the starter?

Bugalugs wrote:
> JeffK wrote:
>> Hi all,
>> I have a 2000 outback, 2.5L. For the past month or so its had a
>> problem getting steadily worse - first thing in the morning when I
>> turn the key it only makes a "click" - the starter doesn't turn at
>> all. After about 10 key turns the starter finally engages, it starts
>> fine, and is usually fine the rest of the day. The battery voltage is
>> good.
>>
>> Its in the shop now, and the guy is telling me he thinks it is the
>> fuel pump. Is that possible? Would a lack of fuel pressure disengage
>> the starter? My experience with cars is with older volkswagens where
>> the starter and fuel pump circuits are independent - a bad fuel pump
>> would still let the starter turn.
>>
>> Thanks for any help.
>>
>> cheers,
>> Jeff

>
> My experience with the symtems you describe has be a problem with a
> buildup of crud between the battery terminals and the attachment of the
> cables. There is enough contact for a small amount of current to flow
> but when the higher drain of a starter is just too much. Cleaning the
> terminals and re-tightening the cables solved the problem. If it happens
> somewhere inconvenient just attempting to gently twist the cables on the
> terminal post is usually enough to get you home.
> YMMV



PS While it is essential that the fuel pump runs when the
engine is running :>) I don't think there is any circuitry
built in that locks out the starter if the fuel pump does
not run.
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  #5 (permalink)  
Old 09-18-2008, 04:33 AM
AS
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Default Re: Does the fuel pump have to work to engage the starter?

The starter will work regardless of the condition of the fuel pump. The
fuel pump will stop working a few seconds after the ignition key is
turned to the on position if the starter does not turn the engine (crank
position sensor)

As stated by others, check your battery connections, engine grounds and
your starter motor solenoid. Did you measure the battery voltage when
trying to start the engine? It should be higher than 9V.

Good luck!

JeffK wrote:

> Hi all,
> I have a 2000 outback, 2.5L. For the past month or so its had a
> problem getting steadily worse - first thing in the morning when I
> turn the key it only makes a "click" - the starter doesn't turn at
> all. After about 10 key turns the starter finally engages, it starts
> fine, and is usually fine the rest of the day. The battery voltage is
> good.
>
> Its in the shop now, and the guy is telling me he thinks it is the
> fuel pump. Is that possible? Would a lack of fuel pressure disengage
> the starter? My experience with cars is with older volkswagens where
> the starter and fuel pump circuits are independent - a bad fuel pump
> would still let the starter turn.
>
> Thanks for any help.
>
> cheers,
> Jeff

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  #6 (permalink)  
Old 09-18-2008, 07:57 AM
Junior Member
 
Join Date: Sep 2008
Posts: 10
Default

I think the starter will still work even if the fuel pump has a problem. If the starter has problems, best if you could bring to a car repair shop so that they can check the starter for problems
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  #7 (permalink)  
Old 09-18-2008, 06:32 PM
Rick Courtright
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Default Re: Does the fuel pump have to work to engage the starter?

Bugalugs wrote:

> Cleaning the terminals and re-tightening the cables solved the problem. If it happens
> somewhere inconvenient just attempting to gently twist the cables on the terminal post is usually enough to > get you home. YMMV


Hi,

Years ago, a co-worker had a second "night job" driving a tow truck. He
always carried a six pack of Coca Cola in the cab. Purpose: it was the
best "field cleaner" anybody knew of for corroded connections. He said
it's gotta be Coca Cola--apparently that brand has more of the "good
stuff" than others--and gotta be the "real" stuff, not the diet or any
other variants. Yeah, you're gonna have a sticky mess to clean up when
you get home, but if it gets you there, that's a small price to pay, no?

Rick
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Old 09-19-2008, 09:30 PM
orbound
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Default Re: Does the fuel pump have to work to engage the starter?

On Sep 17, 9:01*am, JeffK <j...@jeffkennedy.org> wrote:
> Hi all,
> *I have a 2000 outback, 2.5L. For the past month or so its had a
> problem getting steadily worse - first thing in the morning when I
> turn the key it only makes a "click" - the starter doesn't turn at
> all. After about 10 key turns the starter finally engages, it starts
> fine, and is usually fine the rest of the day. The battery voltage is
> good.
>
> Its in the shop now, and the guy is telling me he thinks it is the
> fuel pump. Is that possible? Would a lack of fuel pressure disengage
> the starter? My experience with cars is with older volkswagens where
> the starter and fuel pump circuits are independent - a bad fuel pump
> would still let the starter turn.
>
> Thanks for any help.
>
> cheers,
> *Jeff


fuel pump wouldn't have anything to do with the starter or battery.
start with the simple stuff and work you way up. check your cables for
corrosion and snugness. check the wire(s) on your starter making sure
they are tight and take a volt/ohm meter make sure you have voltage to
the starter. check any secondary grounds. so on and so forth and
hopefully you don't make it to the ingnition. good luck.
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  #9 (permalink)  
Old 09-25-2008, 07:31 PM
JeffK
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Posts: n/a
Default Re: Does the fuel pump have to work to engage the starter?

Thanks everyone. Yep, boobs working on the car - they eventually
wanted to replace the starter - FOR $410!!

With some help from the list archives, I replaced the contacts in the
starter solenoid - One was nearly worn through and they were both
corroded. Cost $10 and took about a half hour. Worked like a charm.

Thanks again,
Jeff




On Sep 17, 9:01*am, JeffK <j...@jeffkennedy.org> wrote:
> Hi all,
> *I have a 2000 outback, 2.5L. For the past month or so its had a
> problem getting steadily worse - first thing in the morning when I
> turn the key it only makes a "click" - the starter doesn't turn at
> all. After about 10 key turns the starter finally engages, it starts
> fine, and is usually fine the rest of the day. The battery voltage is
> good.
>
> Its in the shop now, and the guy is telling me he thinks it is the
> fuel pump. Is that possible? Would a lack of fuel pressure disengage
> the starter? My experience with cars is with older volkswagens where
> the starter and fuel pump circuits are independent - a bad fuel pump
> would still let the starter turn.
>
> Thanks for any help.
>
> cheers,
> *Jeff


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