Coolant gauge issue

SouthArk370Z

That's pretty good thinking. One of the first questions to ask when trouble-shooting is "was anything changed right before it happened?".

Just guessing here but, due to the timing, I'd be willing to bet 0.50 USD that the problems are related. If you can read electrical drawings, download the FSM and see if you can spot wires, harness, connectors, &c that the two circuits have in common.


Edit: Electric fuel pumps, especially those that are mounted internally, are not where one wants to jerry-rig or cut corners. Same goes for brakes and other "mission critical" or safety hazards.

Edit #2: It's possible that the fuel sensors and the coolant temp sensor have the same signal voltage source and a partial short in your jerry-rigging is pulling that source down. See the FSM to check.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma