When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
This seems to be an annoying intermittent problem on my 2000 Jaguar XJ8. After a while of driving the gauge will return to normal. The car starts fine and has plenty of power so im not sure if it's the pump or some other component that may be suspect.
I'd be suspecting the fuel level sender unit. Probably start with looking for duff connections or a loose wire too it.
Also worth trying to take note if it happens at the same fuel level every time, as I've seen them fail in other cars so they've got a dodgy spot on the range & then recover as the fuel level drops.
There is fuel tank cleaner solution as we used on airliners ( specific fuel level sender issues ) but in common auto parts stores ( not all ) and the sender in this case depends on a good ground wire attached to side area of main car battery ( not battery )
Would fuel treatment work? The car did sit for a while before i bought it but its only started doing this recently after owning it for about 7 months. Or would it be wise to just replace the whole sender unit?
Would fuel treatment work? The car did sit for a while before i bought it but its only started doing this recently after owning it for about 7 months. Or would it be wise to just replace the whole sender unit?
Did you check the VIN list on the TSB? if yours is on there, change it.
My 03 XJR had a non-functioning gauge. Always read E. The fuel level sender is a rheostat that goes between 90 and 900 ohms. You can undo connector at tank and put a resistor where pins insert. If get a gauge reading, gauge good and sender is malfunctioning
On later XJ8s access through top so have to pull tank. I pulled and removed sender. Little copper arms that move with float weren’t making contact. Bend arms so contacted. Tested at every angle and also by dunking in bucket. Worked fine.
Replaced along with new pumps for good measure. Didn’t get new sender because $300+ new.
Now when full reads E and when gets to 5/8 tank reads fine rest of way down. I can live with that. In hindsight, wish I’d spend the $300.
Now when full reads E and when gets to 5/8 tank reads fine rest of way down.
Reminds me of a LR I had years ago. Someone before me had put a S2 sender in a S3 & the result was full = E & it'd go up to 3/4 when the tank was empty, oddly enough I got used to it very quickly & it never bothered me.
Fuel Gauge Issue
