My dad has a 93 lincoln town car that wont start

Have you lost the chip out of the key?? try the spare key before you go any further

You need to do several things

Is the battery in good shape & have over 12.5 volts
Do you have fuel pressure at the motor key on engine off
Do you have spark or injector pulse when cranking

Can not nor should you jump a dead battery

You need a good battery or fully charge yours
& then check fuel pressure with a gauge at fuel
rail port

Sounds like an Ignition Module or similar device. Does it have an alarm? Turn the key to ON - not start - and put into Drive and then back into Park. It may be the shifter isn't fully engaged. Also, w/your FOOT ON THE BRAKE shift to Neutral and try to start it.

GL,
Td

Could be a couple different things could be bad starter bad starter solenoid bad neutral safety swich does it make a clicking sound at all when you try to start?

If you sprayed enough into the hose going to the throttle body, yes.
It would need to be close to the throttle body to get to the cylinders.
You (someone) can use a gauge to check for fuel pressure at the fitting on the rail. It looks like a tire valve but don't use a tire gauge.

On a car that old, I would suspect a corroded fusible
link, in the wiring harness

I don't have have referrence material to help you
locate those items.

You still have to start buy checking the battery & it's cables
No power to anything at all,your working your way from
the battery to fusible links & on to fuses,to see what you do have

Really need a wiring diagram,if your into that type of understanding
of electrical

I would think the same but have know clue how to fix. Probably can find Lincoln's support number and they could help.

Bad ground. Check the battery terminals. The amount of juice required to turn over engine is not getting through, where as the radio draws much less juice. Also, once all connections are cleaned, positive & ground at the battery and fram and the hot at the starter (best to do prior to snow fall anyway), you should be good to go. If not, turn on the interior dome light and try to start it. If it doesn't start, have your battery tested. Finally, if all is good, you should have the alternator tested as well. Most auto parts stores will provide that for free!
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Best regards
Ck

When replacing the cylinders the key needs to be turned to just "before" ignition. Then it can be removed/replaced as needed. It sounds like it may be out of cync.