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  #1  
Old 11th June 2019
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rich1068 rich1068 is offline
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Default Untrustworthy fuel gauge!

I thought I was going a little mad. Suddenly an indication that I'm running virtually on fumes when I could have sworn I'd got plenty of juice left. Then it did it again last night, starting off with the reserve light on but then the needle slowly rising in small steps to where it should have been. Yay! Not mad!

So a Google tells me this is yet another 9-5 thing Does this sound like the baffle coming loose issue? And is there a simple way to check?

At least it's reading under rather than over. Thoughts anyone?
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Old 11th June 2019
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Quote:
Originally Posted by rich1068 View Post
And is there a simple way to check?
The simple way to check is lift up the rear seat bottom, open the fuel pump cover, pull up the pump assembly and look around inside the tank.
.
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Old 11th June 2019
CJPeterborough CJPeterborough is offline
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Depending on mileage then most likely the sender resistance ladder has worn..sometimes it can help to remove and clean the connector at the pump.
You can also easily remove the pump then inspect and also check the resistance at the plug whilst moving the float up and down.

Occasionally it can be the baffles.
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Old 11th June 2019
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Quote:
Originally Posted by bob3000 View Post
The simple way to check is lift up the rear seat bottom, open the fuel pump cover, pull up the pump assembly and look around inside the tank.
.
Simple but with a real possibility of blowing up half the street. I like it.

Quote:
Originally Posted by CJPeterborough View Post
Depending on mileage then most likely the sender resistance ladder has worn..sometimes it can help to remove and clean the connector at the pump.
You can also easily remove the pump then inspect and also check the resistance at the plug whilst moving the float up and down.

Occasionally it can be the baffles.
Mileage is 124k. I'll look into the resistance ladder. This is on the verge of out of my depth so may have to pass over to a pro if it gets any worse.
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Old 11th June 2019
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Simple but with a real possibility of blowing up half the street. I like it.
Ya I suppose...if you do your looking around with a match.
.
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Old 11th June 2019
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I could fill my Zippo while I'm in there.
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Old 11th June 2019
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Are you actually nervous about taking a look in the tank?
.
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Old 12th June 2019
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Not really but CJPeterborough's advice regarding checking resistance and cleaning contacts is a little out of my comfort zone. I suppose once I lift the seat and remove the cover it will make a bit more sense.
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Old 12th June 2019
CJPeterborough CJPeterborough is offline
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If you can change a light bulb you should be able to perform the task.
However you do need a simple 5 multimeter...or borrow one.


The hardest part is shifting the sealing ring...you can buy or fabricate a tool however
a suitable drift and hammer does the job tapping on the ring at multiple points around it anti clockwise



https://www.saabcentral.com/forums/s...ghlight=sender
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Old 12th June 2019
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Great link. Thank you.
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Old 17th June 2019
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Lifted the seats and cleaned the few connections there but that made no difference. Watched a video on removing the pump, considered it and thought better of it. Not for me.

If it gets worse I'll take it to my local specialist. Thanks for the help though, I know more than I did.
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Old 1 Week Ago
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Well it started over reading so something had to be done.





Sorted.
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Old 1 Week Ago
horsehockey horsehockey is offline
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Are those yellow things the baffles?
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Old 1 Week Ago
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Yes. I've not seen one fixed in place but I'd imagine from the shape it snakes through the fuel tank stopping the fuel from draining front to back, left to right as the car moves. Once the pump was out you could see it floating around in the tank.
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