My 1993 Buick Regal turns over strong but will not fire or start. What could be the problem?

My 01 regal started doing that i replaced everything from the fuel filter to the thermostat turns out it was the catalic converter. Once i had that replaced my car has ran like brand new

have you checked to see if it is getting fuel,if it,s not getting fuel,check the feul pump .I,m willing to bet it,s your problem.

If the battery is strong and charged, starter is fine, car ran okay while getting progressively worse until it died and won't restart now, might be fuel filter or pump. I've dealt with two cars with fuel filter issues. Both would idle fine, but run progessively worse under load and eventually die and not start although everything else checked out. Engine turned fast enought to start, battery strong, alternator fine, air cleaner clean, all that. No start. Changed fuel filters and done. Everything back to normal. Both cars were about model year 1990 (1989 and 1991). Replaced one in a parking lot and car fired right back up and powered on home just fine, whereas the week leading up to it it ran worse and worse, hesitated on acceleration and finally would die if you hit the gas. Fuel filter may be in engine compartment. Looks like a canister with an in and an out for fuel. Pump is in gas tank and is way more work and money. Good luck, hope this helps.

I would also change the fuel pump relay....
K

It's probably the mass airflow sensor and/or oxygen sensors.

mcdevito75 here, It"s possible the alrm system and the back fireing are associated, specially if the alarm (security system) is factory (built with the car) BEST BET have an auto alarm shop take a look, most auto shops that do glass, windshield, doors etc. also handle alarms.

read the solution I just gave for starled car fuel, air or plugs, wcs pinch fuel line

Test your fuel pressure, make sure it is the right pressure and test the fuel volume.make sure its getting the right amount of fuel. if it checks out ok you need to put the car on a diagnostic machine. you may have a signal problem that requires a lab scope.

maybe swallowed a fur ball... put alot more gas in... 5 or more gallons and retry... with full charged battery

if this car is been sitting, the battery might be low or dead, but if not,
then,
you know your question confuse me a little be, because if your car won't turn, that has nothing to do with the filter, but if the car crank but wont start then it migh be a bad fuel pump, the way to fin that is, by aplying some flamable brake or carburetor cleaner to the intake, then if the car starts or try to, most likelly your fuel pump is gone.