Falcon - 1995 Fuel Delivery

[Ext User(veritas)]

*To settle a discussion with my neighbour*

My take on it:

Turn on IGN = no pump (or perhaps a blip)
Engage Starter = pump runs - green sol.
Engine Turns = pump runs - black sol.
Disengage Starter (leaving IGN ON) = pump continues to run 'cos engine
is running

If that is NOT the case, I've lost the bet - in either case could
someone (who does know for sure) put me straight.


Muchos gracias....

[Ext User(atec 7 7)]

veritas wrote:
> *To settle a discussion with my neighbour*
>
> My take on it:
>
> Turn on IGN = no pump (or perhaps a blip)
> Engage Starter = pump runs - green sol.
> Engine Turns = pump runs - black sol.
> Disengage Starter (leaving IGN ON) = pump continues to run 'cos engine
> is running
>
> If that is NOT the case, I've lost the bet - in either case could
> someone (who does know for sure) put me straight.
>
>
> Muchos gracias....
Close , you turn the key the fans and pump run for couple of seconds ,
once cranked the pump stays on (green sol)

I think the black sol is cpu and ign / general electrics

[Ext User(Noddy)]

"veritas" <veritas@coldmail.con> wrote in message
news:ASO8i.8579$wH4.5165@news-server.bigpond.net.au...
> *To settle a discussion with my neighbour*
>
> My take on it:
>
> Turn on IGN = no pump (or perhaps a blip)
> Engage Starter = pump runs - green sol.
> Engine Turns = pump runs - black sol.
> Disengage Starter (leaving IGN ON) = pump continues to run 'cos engine
> is running
>
> If that is NOT the case, I've lost the bet - in either case could someone
> (who does know for sure) put me straight.

The black relay has nothing to do with the fuel pump's operation per se'
other than supplying power to the fuel pump relay which is the green one.
The fuel pump relay is controlled directly by the ECU.

The sequence is:

Ignition on:

Power is supplied to the power relay (black) which supplies power to both
the fuel pump relay (green) and the ECU. Fuel pump relay starts the pump
which will supply pressure to the fuel rail until the pressure regulator
opens. The ECU shuts off power to the fuel pump relay after 1 second if the
key isn't turned to "Start"

Engine cranked/started:

Power is fed to the fuel pump via the fuel pump relay as soon as the engine
is cranked, and maintained as long as the engine maintains a speed above
120rpm. If it falls below this level power to the fuel pump relay is shut
off and will be resupplied as soon as the ignition key is cycled. A one way
valve in the fuel pump helps to maintain pressure in the line when the pump
isn't running making for instant restarts.

--
Regards,
Noddy.

[Ext User(Noddy)]

"atec 7 7" <user@domain.invalid> wrote in message
news:4663bd9c$1@dnews.tpgi.com.au...

> Close , you turn the key the fans and pump run for couple of seconds ,
> once cranked the pump stays on (green sol)

The fans shouldn't cycle unless the temp sender tells them to.

--
Regards,
Noddy.

[Ext User(veritas)]

Thanks heaps for the input guys - that helped a lot - believe me :)

I had an inkling of the principle involved and diagnosed this guy's fuel
pump as being cactus. A voltmeter reading at the pump indicated a short
pulse when the IGN was switched on - then nothing. I had trouble
getting through to him that he needed to test the pump voltage with the
*engine being turned over*. He was just too thick to understand - and
he was getting mind-numbing advice from the drones of the neighbourhood.

Anyhow, on the basis of this accurate information, I have been more
forceful and convinced him to check properly and to go buy replacement
pump if indicated.

Thanks again..........








veritas wrote:
> *To settle a discussion with my neighbour*
>
> My take on it:
>
> Turn on IGN = no pump (or perhaps a blip)
> Engage Starter = pump runs - green sol.
> Engine Turns = pump runs - black sol.
> Disengage Starter (leaving IGN ON) = pump continues to run 'cos engine
> is running
>
> If that is NOT the case, I've lost the bet - in either case could
> someone (who does know for sure) put me straight.
>
>
> Muchos gracias....

[Ext User(veritas)]

I printed your post and gave it to the neighbour telling him that if he
*really* wanted to get his car running (he had been stuffing around for
two day) - READ THIS! It eventually sunk in - he got another pump from
the wrecker this morning and just drove his car out of his driveway.
Fixed in less than an hour.

SHEESH - some people are hard to help!

PS I doubt he will cough up the ten bucks for losing the bet tho! :)




Noddy wrote:
> "veritas" <veritas@coldmail.con> wrote in message
> news:ASO8i.8579$wH4.5165@news-server.bigpond.net.au...
>> *To settle a discussion with my neighbour*
>>
>> My take on it:
>>
>> Turn on IGN = no pump (or perhaps a blip)
>> Engage Starter = pump runs - green sol.
>> Engine Turns = pump runs - black sol.
>> Disengage Starter (leaving IGN ON) = pump continues to run 'cos engine
>> is running
>>
>> If that is NOT the case, I've lost the bet - in either case could someone
>> (who does know for sure) put me straight.
>
> The black relay has nothing to do with the fuel pump's operation per se'
> other than supplying power to the fuel pump relay which is the green one.
> The fuel pump relay is controlled directly by the ECU.
>
> The sequence is:
>
> Ignition on:
>
> Power is supplied to the power relay (black) which supplies power to both
> the fuel pump relay (green) and the ECU. Fuel pump relay starts the pump
> which will supply pressure to the fuel rail until the pressure regulator
> opens. The ECU shuts off power to the fuel pump relay after 1 second if the
> key isn't turned to "Start"
>
> Engine cranked/started:
>
> Power is fed to the fuel pump via the fuel pump relay as soon as the engine
> is cranked, and maintained as long as the engine maintains a speed above
> 120rpm. If it falls below this level power to the fuel pump relay is shut
> off and will be resupplied as soon as the ignition key is cycled. A one way
> valve in the fuel pump helps to maintain pressure in the line when the pump
> isn't running making for instant restarts.
>
> --
> Regards,
> Noddy.
>
>
>

[Ext User(Noddy)]

"veritas" <veritas@coldmail.con> wrote in message
news:Vv19i.8825$wH4.6432@news-server.bigpond.net.au...

>I printed your post and gave it to the neighbour telling him that if he
>*really* wanted to get his car running (he had been stuffing around for two
>day) - READ THIS! It eventually sunk in - he got another pump from the
>wrecker this morning and just drove his car out of his driveway. Fixed in
>less than an hour.
>
> SHEESH - some people are hard to help!

They are indeed.

> PS I doubt he will cough up the ten bucks for losing the bet tho! :)

Hit him in the back of the head with a long handled shovel. That might help
remember where he left his wallet :)

--
Regards,
Noddy.

[Ext User(veritas)]

Noddy wrote:
> "veritas" <veritas@coldmail.con> wrote in message
> news:Vv19i.8825$wH4.6432@news-server.bigpond.net.au...
>
>> I printed your post and gave it to the neighbour telling him that if he
>> *really* wanted to get his car running (he had been stuffing around for two
>> day) - READ THIS! It eventually sunk in - he got another pump from the
>> wrecker this morning and just drove his car out of his driveway. Fixed in
>> less than an hour.
>>
>> SHEESH - some people are hard to help!
>
> They are indeed.
>
>> PS I doubt he will cough up the ten bucks for losing the bet tho! :)
>
> Hit him in the back of the head with a long handled shovel. That might help
> remember where he left his wallet :)
>
> --
> Regards,
> Noddy.
>
>

< hehe >

[Ext User(Daryl Walford)]

veritas wrote:
> I printed your post and gave it to the neighbour telling him that if he
> *really* wanted to get his car running (he had been stuffing around for
> two day) - READ THIS! It eventually sunk in - he got another pump from
> the wrecker this morning and just drove his car out of his driveway.
> Fixed in less than an hour.
>
> SHEESH - some people are hard to help!
>
> PS I doubt he will cough up the ten bucks for losing the bet tho! :)

The fact that he bought a s/h fuel pump when a new one complete with
news seals and a new filter etc costs less than $100.00 says it all.
He knows what happens when the pump fails so why would anyone with a
brain use a s/h pump with an unknown history?


Daryl

[Ext User(veritas)]

Daryl Walford wrote:
> veritas wrote:
>> I printed your post and gave it to the neighbour telling him that if
>> he *really* wanted to get his car running (he had been stuffing around
>> for two day) - READ THIS! It eventually sunk in - he got another pump
>> from the wrecker this morning and just drove his car out of his
>> driveway. Fixed in less than an hour.
>>
>> SHEESH - some people are hard to help!
>>
>> PS I doubt he will cough up the ten bucks for losing the bet tho! :)
>
> The fact that he bought a s/h fuel pump when a new one complete with
> news seals and a new filter etc costs less than $100.00 says it all.
> He knows what happens when the pump fails so why would anyone with a
> brain use a s/h pump with an unknown history?


He's a nice enough guy - but he seems to be only able to think in simgle
syllables :(

>
>
> Daryl