19 replies to this topic

[Dan]

Carb cars built during the introduction of injection do not have the injection pump in the tank. There is nothing for it to get caught on. There should in theory be no difference between the two senders when used in a carb tank but there can be problems with some specific senders and bending the arm usually sorts it.

I was trying to suggest it might be not actually as full as you think before, your car doesn't have the 5 1/2 gallon tank. The last time they were fitted was 1980 and then only to the very basic model. You did say that you added roughly 13 litres from roughly half full though rather than from empty so that should take it up to about 7 1/2 gallons.

[Dan]

When you brim the tank, where do you have the nozzle? The Mini only has a very short filler so if you push the nozzle too far the pump will cut out early, although you must realise that. The tank should be filled to the base of the filler neck and no more, the sender float should reach that high.

[Big_Adam]

Lulu is a 94

Oops, sorry. But I'm just going on how much petrol you're putting in as oppose to gauge reading. I don't know how to fill your car so it could be anything, just want to remove a variable. Also the two tanks, skinny left, fatty right.

Edited by Big_Adam, 21 August 2011 - 07:42 PM.

[matt615]

Carb cars built during the introduction of injection do not have the injection pump in the tank. There is nothing for it to get caught on.

No they don't have the pump, but they do use the same tank as the injection cars. There must be a bracket in there that the injection pump normally attaches to, and this is what the sender gets caught on.

I have had this exact problem with a 1994 Mini 35. My sender unit stopped working. I removed the original factory fitted sender unit, and found it was the injection type. I fitted a replacement carb type sender, but found my fuel gauge only went to half full. I then removed the new sender unit, and bent it to match the shape of the original sender. When I refitted the new sender unit, my fuel gauge worked perfectly and went up to full.

So I can say with 100% certainty that this is Ocado Man's problem.

This is what carb sender units look like:

http://minispares.co...id=33986&title=

and injection sender, note the only difference is a couple of extra bends in the wire.

http://minispares.co...id=33906&title=

Ocado Man, all you need to do to solve your problem is to buy an injection type sender, or bend your carb sender to match the bends in the injection sender.

Edited by matt615, 21 August 2011 - 07:48 PM.

[Ocado Man]

Carb cars built during the introduction of injection do not have the injection pump in the tank. There is nothing for it to get caught on.

No they don't have the pump, but they do use the same tank as the injection cars. There must be a bracket in there that the injection pump normally attaches to, and this is what the sender gets caught on.

I have had this exact problem with a 1994 Mini 35. My sender unit stopped working. I removed the original factory fitted sender unit, and found it was the injection type. I fitted a replacement carb type sender, but found my fuel gauge only went to half full. I then removed the new sender unit, and bent it to match the shape of the original sender. When I refitted the new sender unit, my fuel gauge worked perfectly and went up to full.

So I can say with 100% certainty that this is Ocado Man's problem.

This is what carb sender units look like:

http://minispares.co...id=33986&title=

and injection sender, note the only difference is a couple of extra bends in the wire.

http://minispares.co...id=33906&title=

Ocado Man, all you need to do to solve your problem is to buy an injection type sender, or bend your carb sender to match the bends in the injection sender.

Looks like we have a conundrum then mateys.

The sender I was supplied with was the injection type. It has the crank in it already. So I can't understand why it will not read full. Something must be preventing free movement of the arm.

Once I locate a metal coat hanger I will get to the bottom of this & report back. (Hopefully soon)