Technical Petrol pump removal

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Technical Petrol pump removal

Koala mate we did as instructed plugged the old pump in put the float to the top switched on ignition position 1 the fuel gauge went up to full then we let the float down to zero nothing happened it stayed at full we turned the ignition off moved the float to halfway switched ignition on gauge went to half moved the float up it stayed at half so wherever you put the float it goes there but can't be altered so the gauge is functioning
Koala mate we did as instructed plugged the old pump in put the float to the top switched on ignition position 1 the fuel gauge went up to full then we let the float down to zero nothing happened it stayed at full we turned the ignition off moved the float to halfway switched ignition on gauge went to half moved the float up it stayed at half so wherever you put the float it goes there but can't be altered so the gauge is functioning

Connect the car's wiring to the old pump. Keep the floater up and turn the ignition on (not crank). Where does the needle go? And when you let the floater easily down, needle does what?
 
Strange 1we connected it up set the float to full turned ignition to 1 the gauge went to full we moved the float up and down but it stayed at full turned ignition off set float at 1/4turned ignition on gauge went to 1/4 moved float up and down nothing it stayed at 1/4 so the gauge is responding but something is faulty
 
Great we are moving forwards

It measures correct at full
It measures correct at half
It measures correct at empty

The gauge and software and wiring are all correct

There's no shorts, open or high resistance

The gauge isn't directly connected to the sender

The level is calculated via a software algorithm to avoid the gauge jumping around up hills, down slopes

If it suddenly drops it's going to think there is a problem, until the ignition is switched off and on again

No doubt if you read the fuel level via the body computer with software it's going to be correct


Let's go back to the original symptoms, and try and understand what's going on

How long have you had the car, has it always been like this, and so on
 
I bought it for my son about 6 weeks ago when we picked it up it was on low no reason to believe it was broken put £20 in went to 3/8 then next week I told him to fill it up about £25 but got in the car and it was still at 1/4 that's as much as I know mate
 
I bought it for my son about 6 weeks ago when we picked it up it was on low no reason to believe it was broken put £20 in went to 3/8 then next week I told him to fill it up about £25 but got in the car and it was still at 1/4 that's as much as I know mate
It seems whatever position the float is in it will go straight there but if you move the float up or down nothing happens it stays where you asked it to go
 
It seems whatever position the float is in it will go straight there but if you move the float up or down nothing happens it stays where you asked it to go
This is correct behaviour

It's software driven,

You don't fill the car with the ignition on

It will reset when the ignition is switched back on

It will not register instantly massive movements as it assuming your cornering, backing or on a slope left to right or up and down
 
This is correct behaviour

It's software driven,

You don't fill the car with the ignition on

It will reset when the ignition is switched back on

It will not register instantly massive movements as it assuming your cornering, backing or on a slope left to right or up and down
So does that mean there is nothing more we can do as it's still showing the wrong reading
 
I bought it for my son about 6 weeks ago when we picked it up it was on low no reason to believe it was broken put £20 in went to 3/8 then next week I told him to fill it up about £25 but got in the car and it was still at 1/4 that's as much as I know mate
The gauge is non linear

We don't know how low the gauge was before the £20 was put in or where it was when the £25 was put in

How many litres were put in (price per liter)

How much driving was done in the week

Just too many variables

I suspect if you make a note of where the gauge is now, and you put another 5 or 10 liters n yourself, it would register correctly within a mile or so
 
So does that mean there is nothing more we can do as it's still showing the wrong reading
We need to keep an eye on it

It doesn't appear to be miles out

The gauge is non linear,

From the top of the orange to the bottom empty is roughly 3-4 litres but there isn't 10 of these segments to full, from full empty to brim full is over 40 litres, (yes it officially 35) but neither extreme is good for the cat

You can go quite a bit under the empty maybe another 100 miles if it's flat

But if you do drive it this low the first few quid when you do fill up not move the gauge

i put a spare petrol can in the car and run it until the orange light came on
 
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