How to fix a fuel gage on a 72 ford thunderbird

google 2002 Ford Thunderbird fuel filter location



https://www.justanswer.com/ford/10q07-fuel-filter-located-2002-ford-thunderbird-thank-you.html

One of them should be connected to ignition feed. I don't know if you have a gage fuse in your fuse box? I won't have a wiring diagram for this model year.
One of those wires is voltage, I don't know if 12 volts? You can check it and see? If one or both wires have too much resistance, it can cause a problem. I can't rule out the fuel gage itself.

this may help

PCV valve would have nothing to do with it !
P1443 - Very Small Or No Purge Flow Condition A fuel tank pressure change greater than a minus (-) 7 inches of H 2 O in 30 seconds has occurred with purge (fuel vapor) flow less than 0.02 pounds per minute.

• Blocked fuel vapor hose between EVAP canister purge valve and FTP sensor.
• Blocked fuel vapor hose between EVAP canister purge valve and engine intake manifold.
• Blocked vacuum hose between EVAP canister purge valve-solenoid and engine intake manifold.
• EVAP canister purge valve stuck closed (mechanically).

Check for blockages between the fuel tank, EVAP canister purge valve and engine intake manifold. Check obstructions in the EVAP canister purge valve diaphragm and ports.
Suggest you buy a repair manual if you want to try an fix yourself .Or Go to ford web site Ford Oem1stop com an pay 29 bucks for 72 hours for repair info . Or take it to a qualified repair shop an have it smoke tested . Or goolge purge valve for a pic. an see if you can find it under the hood .

Firewall4-83-72-61-5Fanradiator

Maybe something wrong with inertia switch? Part of diagram so you can see inertia switch wire colors. How long since a tune-up? Any applicable trouble codes? Also, use a gage check proper fuel pressure, my info says 35--45 psi. I've seen fuel pumps that would run, but wouldn't make proper fuel pressure. I'm not saying the fuel pump has a problem, at the moment, I don't know?

I would check that the engine oil level is high, then I would check that the pressure is high enough by plugging a gauge into the oil pressure switch socket after removing the oil pressure switch.

There is a possibility that the oil pressure switch is bad, or the oil pump has failed, unfortunately.

the fuel pump drawing to much amperage. It's starting to go.

I really doubt it is the fuel gage. You can test the gage by hooking a C cell battery to the wires from the tank. If it pegs the gage is good. You will need to go to Ford to get the sending unit. I doubt they will have this in stock, but they will order it for you. I would not even consider an aftermarket sending unit. Stick to the original Ford part. You will be happier with the results.

Spark at any of the plugs ?