What does ffs mean on the 93 thunderbird

Have you tried checking the crankshaft sensor? This will happen when is gone bad.

The gas tank meter is faulty.

You might need to bleed the fuel sistem!

FFS find fuel soon.

Hi, FFS means Feedback Fuel System. It is a system by which your engine monitors exhaust gases usually through one or more oxygen sensors to optimize fuel delivery. Usually when an O2 sensor gives an erroneous signal or one that is out of the acceptable range for the comperters preset parameters, it will trigger this fault. In turn, your vehicle will be delivered the incorrect amount of fuel as it runs for optimum performane, economy and emissions. You should be able to obtain a trouble code from the engine's computer to further diagnose which part of the system has faulted.

Please remember to rate this answer! Thanks, Mike

That should be acurate to about a few miles, it take the average miles per gallon to find its reading, a good test would be to put a gallon of gas in the car and drive until it tells you you have 2 miles left and then go get gas, this way if you run out you will be able to put gas in, i think this would be a good way to test the system. good day.

FFS= Feedback Fuel System, Check your ignition module most parts stores can test them once you have it removed, should be located on the side of the distributor.

Hi:
I am pretty sure that the light comes on when you have approx 1/8 tank left. In my honda, with a 12 gallon tank, that equated out to 1.5 gallons, or approx 45 driving miles on flat land in the city. Of course, you should check your average miles per gallon with your driving style , as well as filling the tank once the light comes on, to see how many gallons are left, and you will have an accurate number!

Your gauge is reading high ... I think you are out of gas. You should calculate your actual Miles Per Gallon - find out what the capacity of your tank is and fill accordingly. For esample, you actually get 15 miles per gallon, your tank is 20 gallons - you should be able to drive about 300 miles between fillups. At 250 miles, start looking for a station.

I have a '95 Cirrus LX 2.5L V6 (with 150k miles) that has been having the same problem -- it just shuts off unexpectedly while driving and then fails to start right afterward. No "Check Engine" light beforehand and no fault codes were stored. After setting for a while, the car would eventually start again. Initially this problem happened only seldomly but over several months it gradually became more frequent.

After doing a lot of research on the Internet and troubleshooting with the Haynes manual, the prime suspects were as follows:
1) Crankshaft Position Sensor (mounted onto the engine block under the distributor). I replaced this and the car started but it didn't last long before it abruptly quit again. This time, whatever was degrading finally broke for good; the car would no longer start even after sitting for a couple days.

2) Camshaft Position sensor and/or ignition coil -- (both are in the distributor on the 95 Cirrus LX 2.5L V6). I replaced the distributor (cost about $225). The car still would not start, though!

Using the electrical diagrams in the Haynes manual, I began troubleshooting and found that all of the top three mentioned items use the same +8VDC from pin 44 of the Powertrain Control Module (PCM). I was only reading +4.88VDC -- way too low for for the two 'Hall Effect' solid-state sensors to work properly.

I didn't want to spend hundreds of dollars buying a new PCM if I wasn't absolutely sure it was the problem so I took out my PCM (it's up front between the fuse box and the air cleaner on the driver's side and can be removed fairly easily). Since this is a single-board electronic device, being an electronics technician, I tried an old trick and froze the PCM for more than 12 hours so the circuit board and solder joints would contract and make a better connection. I then reinstalled the PCM and tried starting the engine -- and it fired right up and ran smoothly.

So, the PCM (P/N PO4606064) ended up being my problem.

NOTE: There are two replacement models of PCM for this car. One model is for cars with "Firm Feel Suspension (FFS)" and another model for those without; mine DOES NOT HAVE FFS. Make sure you get the correct one.
Also, on one of the threads on the Internet for another person having this same problem, a Master Mechanic stated that 'Firm Feel Suspension (FFS)' was the same thing as "Speed Sensitive (power-assisted) Steering (SSS)". I confirmed with the Chrysler experts that THIS IS NOT THE CASE! They are separate things -- according to my VIN, my car does not have FFS but it has SSS.