JoMo1974

JoMo1974

Member
weird_fuel_pump2.jpg
weird_fuel_pump.png


Hi again, am looking into a potential fuel delivery issue with a '74 109 and have come to the conclusion (I know, I'm so astute) that the original mechanical pump has been replaced by this wee electric jobby at some point. It makes noise but nothing much comes out, so I'm guessing it's kaput.

I don't want to be fitting a mechanical one back as it appears they suffer from their own issues, but does anyone have any recommendations for a new electric pump? Also, should I fit a pre-pump inline filter to save it getting clogged over time or is that going to interfere with things even more?

Thanks!
 
Located what I think is this pump (or one very much like it) on eBay: https://www.ebay.co.uk/itm/202771434372

I was starting to think that maybe the delivery pressure would be wrong and mess things up but I see that John Craddock sell them as replacement bits for the petrol 2.6 so I think maybe it's ok and I'll just go like-for-like:

PRC3901 - Fuel Pump Electric V8 and 2.6

PRC3901, fuel pump electric v8 and 2.6 for Series 3, Defender 90/110, Range Rover Classic, Land Rover Parts and Range Rover Parts
www.johncraddockltd.co.uk www.johncraddockltd.co.uk

Does anyone think the JC one at nearly double the price would be any different than the eBay one?
 
Last edited:
I have no idea if that is actually up to the job. But it looks reasonably new in your pic. So maybe there is a blockage or a hole letting air in.
Oh and yes I would fit an inline filter somewhere easy to get to and you can see (engine bay :))

What engine do you actually have?

@Hicap phill

J
 
marjon said:
I have no idea if that is actually up to the job. But it looks reasonably new in your pic. So maybe there is a blockage or a hole letting air in.
Oh and yes I would fit an inline filter somewhere easy to get to and you can see (engine bay :))

What engine do you actually have?

@Hicap phill

J
Click to expand...

Wouldn't the filter be better placed before the pump?

It's a 2.6L straight six petrol
 
I've just seen the BritPart equivalent, it looks the same but has this stamped on the box "MUST NOT BE MOUNTED HORIZONTAL. MUST BE MOUNTED MORE THAN 30DEG FROM HORIZONTAL".
So that might be my problem? Although how it's coped up to now is anyone's guess (unless it was fitted and then not driven until the day i bought it?!)
 
Another way to check if it’s working is to restrict the out put. The pump will stop ticking,when flow released pump will tick again
 
JoMo1974 said:
Located what I think is this pump (or one very much like it) on eBay: https://www.ebay.co.uk/itm/202771434372

I was starting to think that maybe the delivery pressure would be wrong and mess things up but I see that John Craddock sell them as replacement bits for the petrol 2.6 so I think maybe it's ok and I'll just go like-for-like:

PRC3901 - Fuel Pump Electric V8 and 2.6

PRC3901, fuel pump electric v8 and 2.6 for Series 3, Defender 90/110, Range Rover Classic, Land Rover Parts and Range Rover Parts
www.johncraddockltd.co.uk www.johncraddockltd.co.uk

Does anyone think the JC one at nearly double the price would be any different than the eBay one?
Click to expand...

25 quid bgay stuff I wouldnt touch that, ive always used facet pumps or walbro & depending on the pump you might need
a pressure reg pays yer money n takes yer chances.
 
My 2.6l is fitted with an electric pump that looks very like the one you have pictured, the parts book, and my original vehicle before rebuilding say 2.6l are all electric not mechanical?
Mine is mounted vertically just like the original pump was though?
Original pic and replacement fitted but not yet plumbed.
 

Attachments

  • IMG_20210424_190607806.jpg
    IMG_20210424_190607806.jpg
    1.5 MB · Views: 130
  • IMG_20210910_200819487_HDR.jpg
    IMG_20210910_200819487_HDR.jpg
    199.1 KB · Views: 161
JoMo1974 said:
View attachment 291086 View attachment 291087

Hi again, am looking into a potential fuel delivery issue with a '74 109 and have come to the conclusion (I know, I'm so astute) that the original mechanical pump has been replaced by this wee electric jobby at some point. It makes noise but nothing much comes out, so I'm guessing it's kaput.

I don't want to be fitting a mechanical one back as it appears they suffer from their own issues, but does anyone have any recommendations for a new electric pump? Also, should I fit a pre-pump inline filter to save it getting clogged over time or is that going to interfere with things even more?

Thanks!
Click to expand...
Not really had any issues with the mechanical pumps, to be honest.
I always think standard is best.
And anything that avoids electricity on a vehicle is always a winner for me.
 
Turboman said:
Not really had any issues with the mechanical pumps, to be honest.
I always think standard is best.
And anything that avoids electricity on a vehicle is always a winner for me.
Click to expand...
I agree. As far as I can tell, the only real issue with the original mechanical pump is when you leave the vehicle unused for a couple of weeks and fuel seems to drain out of the pump and back towards the tank. Priming it by hand is a pain. When this happens, I just pour some petrol straight into the top of the carb and fire it up.

Col
 
Colthebrummie said:
I agree. As far as I can tell, the only real issue with the original mechanical pump is when you leave the vehicle unused for a couple of weeks and fuel seems to drain out of the pump and back towards the tank. Priming it by hand is a pain. When this happens, I just pour some petrol straight into the top of the carb and fire it up.

Col
Click to expand...
I don't think I have ever had that happen. Mine always seem to start up with a bit of cranking, however long they have been left.

Electric fuel pumps, on the other hand, I have always found to be trouble. I think the ones people fit on Series are pretty much the same as what was on Morris Minors, and we were always opening the bonnets on those to tap the pump and fiddle with the connections.
 
Turboman said:
I don't think I have ever had that happen. Mine always seem to start up with a bit of cranking, however long they have been left.

Electric fuel pumps, on the other hand, I have always found to be trouble. I think the ones people fit on Series are pretty much the same as what was on Morris Minors, and we were always opening the bonnets on those to tap the pump and fiddle with the connections.
Click to expand...
I have had a few MG's and they are all fitted with SU pumps. They generally work OK but do give trouble now and again. Its when you put in the key and don't hear the click, click click that you know you are going to have to give it a knock.
TBF the problems are usually the points in the pump and lack of maintenance, its not normally the pump diaphragm itself.
 
You must log in or register to reply here.

Similar threads

NowayPedro
Electric fuel pump won’t stop priming.
Replies
17
Views
2K
NowayPedro
NowayPedro
splutter
Series 3 SU electric fuel pump
Replies
1
Views
884
kermit_rr
kermit_rr
jrose
Fuel pump snags
Replies
7
Views
1K
adrian hogg
adrian hogg
jrose
Fuel pump for SU Carb.
Replies
2
Views
3K
kermit_rr
kermit_rr
J
1987 Defender 90 for sale. Galvanised! SOLD
2
Replies
24
Views
9K
Knappster
Knappster