Hi All,First time postIhave a bad fuel problem 1971 xj6 fuel seems to be getting pumped from right hand to left tank. Have replaced seals on the lids thought it was old seal. But has after market fuel pumps fitted i thought pumps would have one way valves but you can blow both ways on the left pump. Was thinking it was pressure at first but i filled both tanks and ran right hand and left hand over flowed a lot of fuel out the top.to the point that a car behind drove up next me and told me. Will fitting su pumps back make a diffrence ?. Any help would be great. Will post some pics of the girl soon as i slowly bring her back.

 

 

Hi Alan
Thanks for the reply, i will be removing the IRS in a few weels to replace brakes and mounts and fix some oil leaks. So ithink i will remove the fuel tanks and give them a look over while iam in there and i;ll look for the valves. I realy need to fix this problem as its flows out at a rate of knots has damaged the paint on the rear mudguard. I;ll have another look through my manual and look for these valves.
Jeff.

 

If it is a series 1 XJ6 as your post suggests it will be a carbied car and not have return lines to the tanks. I assume the pumps have an internal check valve inside since there is no shut off valve/switch between the pumps.
Possibly the after market pumps do not have a check valve inside them(or it has failed). Therefore the pump will be pumping fuel to the carbies as well as back through the other pump to the other tank at the same time.

If it an S1 you have I have a lot info on parts etc in Qld & Aus. And all part numbers for your car. (PM me for my ph number or details)

 

Do you have the part numbers for the see thru fuel filters?


Thanks, Bill

 

Small filters W3.5 $5 each
Large filter Z14/15kC $4.50

Best I can do, Just generic items from my local parts store. Pretty much available everywhere here in sizes from lawn mowers ,motorcycles & cars.

 

Jeff, some info after our phone chat today.

The pumps I have are ECCO 1.5LM12v . They have an internal check valve in them.

A couple on ebay, you would need to check with the seller if they have check valves.

https://www.ebay.com.au/itm/12-volt-...53.m1438.l2649

https://www.ebay.com.au/itm/12-volt-...53.m1438.l2649


Another cheaper option might be fitting inline check valves between the tank & the pump. And use your pumps you already have. They are all over ebay. I used this style on my old Jeep I had, to save removing the fuel tank to replace an internal fuel pump with a failed check valve.


https://www.ebay.com.au/itm/5PCS-8mm...oAAOSw9N1V2ZcH

https://www.ebay.com.au/itm/5PCS-12m...kAAOSw9N1V2ZcO

 

Cheers 01xjr,

Was talking to jagdaim today, got prices coming for all the rear end and a price for su fuel pumps going to keep it all original as i can. All depends on how much i want to spend i guess. but for now get the rear end finished first.

Howie .

 

Just as an aside , we have been using Ecco fuel pumps in our local club for a while now. Their low pressure pumps are very good performers in our experience, would buy again happily.

 

My car came with a single Repco pump & a tee fitted. The Ecco pumps were in the boot still in boxes with all the bushes for the front suspension. I assume the PO was planning on doing the work before he lost interest and sold the car.

I have had the ecco pumps in 4 1/2 years now and no problems.