tims31
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| posted on 25/7/17 at 08:44 AM |
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quote:
Originally posted by obfripper
The relay you have is a general purpose type that would normally be used in conjunction with a mechanical switch. An oe fuel pump relay would be a
good upgrade to your existing one , the other thing is to match the oe pin assignment (12v to pin86 -ve to pin85) so the current flow is correct for
the internal diode.
0732014112 is a bosch one that's configured for a fuel pump with an inline diode on pin 86 for landrovers etc, 61361729004 is a bmw fuel pump
one that has an inline and a parallel diode. The oe ford one is no good for your existing plug as it is a micro relay.
Dave
Thanks Dave,
Funny as I ended up in Halfrauds yesterday looking at relays as I couldn't get one from my regular place and noticed that the diode ones seemed
to mention for fuel pumps.
Below is how my relay is currently wired, with your suggestion would a relay with a diode work for Pin 85 which goes to the ECU.
Can you buy micro relay holders as the best posible course would be to use the original Ford relay but if I used the Landrover one can you suggest
where these can be bought please.
EDIT: Managed to find one the same for Landrovers at Powerspark but the Part number is 0332014112 not 07 but seems to be the same one.
Sorry for my ignorance but why does the landrover one (Bosch) use and inline diode where as the majority of others I have seen use one in Parallel,
which serves as better protection?
[Edited on 25/7/17 by tims31]
[Edited on 25/7/17 by tims31]
Build: http://www.martinsfurybuild.co.uk/
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obfripper
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| posted on 25/7/17 at 10:49 AM |
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You're wired for a type a relay, the bosch landrover one is wired for type b which has 86 and 30 swapped over, you may be able to move the 2
connectors around to match.
It's landrover part no AFU2913L.
Have a look here for some more info and they also supply connectors and relays etc.
http://www.12voltplanet.co.uk/relay-guide.html
Ebay is ok if you can wait a few days, but ensure the part matches as ebays part matching when you give it a part number can be flaky at best.
The relay you've found looks to be ok, there's some tech specs here, it looks to have the type b layout.
https://www.partsinmotion.co.uk/electrical-x/relay/bosch-relay-0332014112-detail
Dave
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tims31
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| posted on 25/7/17 at 11:00 AM |
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quote:
Originally posted by obfripper
You're wired for a type a relay, the bosch landrover one is wired for type b which has 86 and 30 swapped over, you may be able to move the 2
connectors around to match.
It's landrover part no AFU2913L.
Have a look here for some more info and they also supply connectors and relays etc.
http://www.12voltplanet.co.uk/relay-guide.html
Ebay is ok if you can wait a few days, but ensure the part matches as ebays part matching when you give it a part number can be flaky at best.
The relay you've found looks to be ok, there's some tech specs here, it looks to have the type b layout.
https://www.partsinmotion.co.uk/electrical-x/relay/bosch-relay-0332014112-detail
Dave
Thanks Dave. I found it by using the Landrover part number in the end.
The relay plug is removable so I can swap the connectors around ok, I just couldn't find a diagram showing the pins but so long as I can swap
them around and the diagram you have linked to is for the one I have I should be okay.
Do you have an idea why this has an inline diode as opposed to parallel like so many others, is there any advantage?
Also the diode for inline show it as arrowed towards Pin 85 where for a parallel one the arrow points towards Pin 86, from what I am reading it seems
important to have the diode facing the correct way.
Thanks for all your help.
[Edited on 25/7/17 by tims31]
Build: http://www.martinsfurybuild.co.uk/
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obfripper
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| posted on 25/7/17 at 11:19 AM |
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The parallel one clamps the flyback current by closing the circuit as the relay returns to open, the inline one prevents current spikes going back to
the ecu.
The both have a similar effects in restricting flyback current flow, having both in the same circuit is covering all bases
Dave
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tims31
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| posted on 25/7/17 at 11:51 AM |
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quote:
Originally posted by obfripper
The parallel one clamps the flyback current by closing the circuit as the relay returns to open, the inline one prevents current spikes going back to
the ecu.
The both have a similar effects in restricting flyback current flow, having both in the same circuit is covering all bases
Dave
Excellent,
Thank you Dave, hopefully fitting one of these relays should stop the issue I have been having and the relay will be more reliable.
Build: http://www.martinsfurybuild.co.uk/
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big_wasa
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| posted on 25/7/17 at 12:25 PM |
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I've never had a problem on the fuel pump side of things with feed back.
I've got a couple of relays if you want to try them.
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avagolen
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| posted on 25/7/17 at 01:36 PM |
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Hi Martin,
To save chasing relays, I would attempt to put a bulb in place of the relay and see what that shows. Just in case the ecu is shutting the pump off and
not the relay poor connections. Make sure any bulb fitted does not draw too much current.
The Answer for everything, but never the last word....
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tims31
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| posted on 25/7/17 at 02:33 PM |
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quote:
Originally posted by avagolen
Hi Martin,
To save chasing relays, I would attempt to put a bulb in place of the relay and see what that shows. Just in case the ecu is shutting the pump off and
not the relay poor connections. Make sure any bulb fitted does not draw too much current.
Thanks Len,
I managed to get a Type B relay with a diode fitted for now, swapped the wiring in my relay block around and finally managed to get out for a run with
no problems so hopefully it is now sorted and the original standard relay had just burnt out over time which was the issue.
When I ran the car as you suggested with the pump hooked up to the switch live it ran fine too so it does seem to point to the relay as the problem
rather than anything else.
quote:
Originally posted by big_wasa
I've never had a problem on the fuel pump side of things with feed back.
I've got a couple of relays if you want to try them.
Thanks Warren, I'll see how I go with the one I have at the moment but fingers crossed the issue is sorted.
Thanks to everyone for your help
Build: http://www.martinsfurybuild.co.uk/
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avagolen
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| posted on 25/7/17 at 05:05 PM |
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Hi Martin, that's great news. Enjoy.
The Answer for everything, but never the last word....
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