Car has been sitting a lot lately due to not being able to get to work on it since starting a new heavy job, just started it few days ago to see this new issue pop up! was wondering if its been seen before and if there is any easy fixes to try and reset it.
Here is the google photos video link https://photos.app.goo.gl/p7YMqCWFmR4YvCsq7
Also the fuel guage arm is pointing to the flooded position. Haven't driven it so not sure if that's accurate or not. Also yes speed arm doesn't move with gas pedal applied. Thanks for any help

 

Speedo behavior is caused by a missing right rear wheel speed sensor signal - an OBDII reader will show you codes including that one.
can't help on the other indicator acting weird

 

IF you asking about your 2004 X400, this is the X308 section of the forum!!!!!!!!!!!

 

You may definetly have faulty instrument cluster. Easily too rear abs sensor

 

Thank you for the heads up. Already had a check engine light so wasn't sure if it would catch this as well and my friend was borrowing my OBDII! I'll check it tomorrow and post codes.

 

I am not. I'm asking about my 1998 XJ8. Don't have it listed as I don't drive this one its just for sale.

Weirdly the coolant arm fixed itself however the MPH is still buggin. My ABS is definitely bad somewhere light has been on for a moment.

 

I HATE MYSTERY CARS.

Please start all info requests with a MAKE, MODEL, YEAR!!!!!!!!!!!!!!!!!!!!

 

Maybe help us out with your terms?
I don't understand what a;
Coolant arm is?
Fuel Gauge Arm Pointing to the flooded position?
Speed Arm does not move with gas pedal applied?
.
.
.

 

Swap both of your rear wheel speed sensors to see if the speedometer returns to normal.