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Old 09-27-2005, 14:01   #1 (permalink)
holbay
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740 fuel pump relay

hi all can anyone tell me where the fuel pump relay is on a 1988 740 estate
with B200E engine mine appears to be shot and i dont know where it is.
thanks


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Old 09-27-2005, 14:01   #2 (permalink)
Jan-Erik
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Re: 740 fuel pump relay

holbay wrote:
> hi all can anyone tell me where the fuel pump relay is on a 1988 740 estate
> with B200E engine mine appears to be shot and i dont know where it is.
> thanks
>
>

It should be behind the aschtray (maybe spelled wrong) behind the fuses
if you pull out the fuseholder there is some relays plased behind them
and the relay you are looking for is in place E
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Old 09-27-2005, 15:01   #3 (permalink)
holbay
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Re: 740 fuel pump relay

thanks Jan found it and had to re-solder the relay back on but now engine
starts and die`s now think one of the fuel pumps faulty. thanks for your
help,holbay
"Jan-Erik" <jdr85@gs.bergen.hl.no> wrote in message
news:X5udnYZ2RbbmMKTe4p2dnA@telenor.com...
> holbay wrote:
>> hi all can anyone tell me where the fuel pump relay is on a 1988 740
>> estate with B200E engine mine appears to be shot and i dont know where it
>> is. thanks

> It should be behind the aschtray (maybe spelled wrong) behind the fuses
> if you pull out the fuseholder there is some relays plased behind them and
> the relay you are looking for is in place E



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Old 09-27-2005, 17:01   #4 (permalink)
James Sweet
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Re: 740 fuel pump relay


"holbay" <holbay@ntlworld.com> wrote in message
news:5Mi_e.1595$9l4.825@newsfe4-win.ntli.net...
> thanks Jan found it and had to re-solder the relay back on but now engine
> starts and die`s now think one of the fuel pumps faulty. thanks for your
> help,holbay



Does the tach droplike a rock when the engine dies or does it follow the
RPM?


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Old 09-28-2005, 01:01   #5 (permalink)
holbay
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Re: 740 fuel pump relay

hi james rev counter follows engine just like running out of fuel. when it
stops the pump which runs till pressure is reached is not making usual
sound, it growls so suspect it knackered. thanks.

"James Sweet" <jamessweet@hotmail.com> wrote in message
news:%kk_e.13320$y64.3960@trnddc06...
>
> "holbay" <holbay@ntlworld.com> wrote in message
> news:5Mi_e.1595$9l4.825@newsfe4-win.ntli.net...
>> thanks Jan found it and had to re-solder the relay back on but now engine
>> starts and die`s now think one of the fuel pumps faulty. thanks for your
>> help,holbay

>
>
> Does the tach droplike a rock when the engine dies or does it follow the
> RPM?
>
>



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Old 09-28-2005, 02:01   #6 (permalink)
Boris Mohar
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Re: 740 fuel pump relay

On Wed, 28 Sep 2005 07:31:43 GMT, "holbay" <holbay@ntlworld.com> wrote:

>hi james rev counter follows engine just like running out of fuel. when it
>stops the pump which runs till pressure is reached is not making usual
>sound, it growls so suspect it knackered. thanks.
>
>"James Sweet" <jamessweet@hotmail.com> wrote in message
>news:%kk_e.13320$y64.3960@trnddc06...
>>
>> "holbay" <holbay@ntlworld.com> wrote in message
>> news:5Mi_e.1595$9l4.825@newsfe4-win.ntli.net...
>>> thanks Jan found it and had to re-solder the relay back on but now engine
>>> starts and die`s now think one of the fuel pumps faulty. thanks for your
>>> help,holbay

>>
>>
>> Does the tach droplike a rock when the engine dies or does it follow the
>> RPM?



Fuel pump relay can also fail by through contact erosion since it is
switching large current. I bonded some fine grit abrasive paper back to back
and cut a sliver that can slip between the contacts for cleaning. the middle
of two relays on the circuit board seems to suffer most of the wear.



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place


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