Fuel Gauge

[Omid]

Hey Fellas,

Back with a problem,

A few days ago I was at the petrol station (i was empty), put in 20Pounds, I was driving for a minute and noticed the needle was still on 'E'. Then it suddenly shot up.

All good from then until tonight, i was empty again, went to the pump, put in 15Pounds and the needle didnt move when i got in the car.

Its on 'E' all the time, but when i turn the car off it goes below 'E' and then back up to 'E' with ignition on!

Please help. dont know how much fuel in the car!!!

[Asi]

tap the cluster a few time and see if that works?

[lexdavis]

same sort of problem mate when im empty it sits a 1/4 but when i turn of the engine it drops below E dont understand at all

[Omid]

tapping no good!!!

[lexdavis]

mine is just a standard ecu would it be expensive to sort out if i took it to a garage to try and sort it.

not to bothered it just annoys me LOL

[Yeldarb]

If the car has been empty for a prolonged period of time then the gauge can "stick" or look wrong. Try topping the tank right up - that solved my sticky gauge when I 1st got the car.

My fuel gauge works 100% perfect with a stand along ECU - its only people who go to garages who don't take the time to learn how the car works and rush jobs that mess up the fuel gauge problem.

It basicly counts every time injector 1 fires and under what load, this is then used to calculate fuel used and adjusts the gauge accordingly. Every 1/4 tank or every time you turn the car on it double checks with the sender in the tank and adjusts accordingly. This system eliminates false fuel level readings.

[Rob]

.

My fuel gauge works 100% perfect with a stand along ECU - its only people who go to garages who don't take the time to learn how the car works and rush jobs that mess up the fuel gauge problem.

I wonder who that might be!!!!!

[Omid]

The car is a 2000 year IS200 with full lexus service history. Everything is original on the car, no change made to ecu!

Any other plausible solutions??

Cheers chaps!

[Yeldarb]

probably get a ban if I name names...............

[Rob]

why would you get banned by saying TDI??? its well known they cant make the fuel guage work after fitting aftermarket ECU's.

[Yeldarb]

Mr Mole was banned just for asking not to be a gold member...............

[Rob]

Mr Mole was banned just for asking not to be a gold member...............

what??

[mattc]

I have had this problem with my car. When the needle went below a quarter of a tank I would then fill up and it would be in the same place again. Then after a short while or going over some bumps it would go back to the right place.

I have taken my dash out recently to change the bulbs so I made sure the connectors on the back where good and secure and since then the gauge has been fine.

Might be worth a go.

[deckie77]

I'm with Yeldarb, sounds plausable, i dont know but would imagine there is a float in the tank, and yours has stuck, top it right up and see, no loss if it doesn't, you'll still use the petrol.