Hi Guys, I have a Fiat Siena 1.2 EL 2001 sedan. Second owner and shared my life with her for the past 10 years. Head has been worked on twice due to blown head gasket. The second time was a few weeks ago. After getting the car back, I noticed that the Fuel Gauge jumps up and down.:bang: It will eventually stop at the actual reading after a few minutes of driving. a Friend suggested that I reset my ECU, not sure how that could help. Any suggestions?

Look in punto 2 b section
Could be poor earth..or wiring

Disturbed when head work was done.

Charlie

Welcome at Fiat Forum.
Bad earth for sure.
Post anything else regarding your car in the "Palio" section if you will.

Thanx guys. Will post in the Palio section. Much appreciated. Now to find the earth mounting.

Shman said:

Now to find the earth mounting.

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Could be anywhere.
I had a similar problem with the fuel gauge in my Alfa GT jtd, jumped up and down like crazy.
Turned out to be a bad earth connection on one of the injectors....!!!

Thank you PPU! Would an auto electrician be able to do the fault finding(check if all the earth connections are correctly secured) or who do I take the car too?

Shman said:

Thank you PPU! Would an auto electrician be able to do the fault finding(check if all the earth connections are correctly secured) or who do I take the car too?

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Auto electrician.. but worth checking the basics yourself..

varesecrazy said:

Auto electrician.. but worth checking the basics yourself..

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Thanx alot varesecrazy. Just left the house now...noticed there is water inside my left rear door!!! What is happening! On to the next...

Something blocked underside door perhaps..
I always take out the rubber plugs, so water can escape better....

Shman

You may find too much water has endered the electrics..causing your issues.

Drain door. And let parts dry.

Charlie

varesecrazy said:

Shman

You may find too much water has endered the electrics..causing your issues.

Drain door. And let parts dry.

Charlie

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Thanx a lot varescrazy! Drained the door with the guidance of Peter Pick-Up! The needle is not jumping at all. Take it I will have to remove the inside cover to properly dry the inside. Thanx again guys. Now back to the idling and revs going up as soon as I touch my brake pedal...Where do I post that?

Shman said:

Now back to the idling and revs going up as soon as I touch my brake pedal...Where do I post that?

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Palio is the nearest relative to your car that we tend to cover here

Hi guys! no its stuck on Full. I know it should not be there, but its no longer jumping but fixed on full! what to do?

Shman said:

Hi guys! no its stuck on Full. I know it should not be there, but its no longer jumping but fixed on full! what to do?

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IDEA:lift up the back seat. And unplug the wiring to the pump/ level sensor.

See if the gauge returns to ZERO

THEN reinstall wiring connection..see what happens.

There are GUIDES for the fuel pump in PUNTO section.

Charlie