Ultrasonic gauges need to be replaced every couple of years depending on how many times they are used. They are easily replaced so why not do it when you feel their usefulness is done.
check the gauges, disconnect the sending unit wires and see if the gauges go up, if not it is the gauges, make sure the key is on
low coolant or sticking thermostat
That happens because the engine is overheating. Normal causes are low coolant, bad thermostat, or inoperative fan.
Depending on the year, it could be in a number of places. In 2003-2007 350z it was in top left of the three circular instrument gauges above where the navigation would be.
when you had that problem did the van start? we have the same stuff going on but ours wont start
i had this happen once on an 03 dodge minivan. the alternator went bad and the battery was going dead but had enough power to get the engine started. once i replaced the alternator and charged the battery the gauges worked again. good luck!
Check your fuses. If it is not a fuse, they are notorious for the dash burning out and needing to be replaced.
All that would be left would be a short in the wiring to the alternator.
Nothing
ANSI B40.1 has been replaced by ANSI/ASME B40.100-2005Pressure Gauges and Gauge AttachmentsThis Standard (B40.1) is confined to analog, dial-type gauges, which, utilizing elastic elements, mechanically sense pressure and indicate it by means of a pointer moving over a graduated scale. This Standard does not include gauges of special configuration designed for specific applications, edge reading, deadweight or piston gages, or any other gauges not using an elastic element to sense pressure
temp should be 190 for a 4.0 ....AlsoIt depends on the thermostat that you have installed. If it's a 180 degree thermostat, the engine should run at right around 180 degrees. Recognize that stock engine temp gauges are notoriously inaccurate so don't blame the thermostat if everything else seems ok but the gauge says the temp is off.