l think it is a 1999 ? What can l check?

Start with the battery. Sounds like there is not quite enough ''umph'' to get it to turn over - especially if it is cold outside when it did not start.

You can also try tapping your starter with a hammer while somebody else tries getting it to turn over. Sometimes the starter gets gunked up and it needs to be ''loosened'' in order to turn over.

check for spark also check fuel pump&filter you should smell fuel if working

water pump or fuel pump sounds like it is not getting any gas

Pull the Plug wire & make sure you're getting spark. If there is spark then check the ignition module. The only way u will know for sure is if u will take it to Auto Zone & let them run a Diagnostic test on it for FREE. The reason the will do it for free is because more then likely u will buy the part there. Good Luck, & make sure u get a a copy of the Trouble Codes that Auto Zone will offer for the asking. Older Cars & Trucks one could fix no problem without the Diagnostic Test because of the lack of Computer Controlled Vehicles. Now days, the Computer runs everything & shows a trouble code when something goes bad with the way the Vehicle performs. Working on a vehicle without running the Diagnostic stage is nothing but a guessing game. If u want it done right the first time Get the Diagnostic is done & then u can proceed to fixing ur Vehicle.

l work at a shop & we specialize in saabs. the three most common reasons for a saab of ur vintage to ''crank but not start'' are:

1. ignition/coil module. the ''ignition cassette'' as it called, that bolts to the top of the cylinder head will fail.

2. crank position sensor. sensor fails due to age

3. fuel pump dies.

there is not a whole lot u can do besides taking it to a specialist. u can not ''check for spark'' because there is no spark plug wire on ur car.. If u can smell fuel, that would at least indicate that ur fuel pump is pumping. my shop could diagnose it in less than an hour

You do not mention whether or not ur Saab is a turbo or not, so lets try this. First, if ur car is a '99 it is not a 900 model, last year for 900 is was '98. Check the EPA compliance tag under the hood on the core support for the model year, upper right corner of the tag. Next, what engine do u have, 4 cyl. or 6 cyl.? If a 4 cyl. then look at the drivers side of the engine head assembly. Is there a distributor cap & sparkplug wires pointing toward the drivers side fender? If so u r not a turbo car. If no distributor then look at the top of the engine head in the center, running the length of the head, there will be either a black or a red long piece that will say ''ignition cassette''. If u have the cassette there is little u can self test & the local pimple faced kid at the AutoZone etc. can not either so do not waste ur time towing the car there for not. This also applies if u have the 6 cyl. engine. If u do have a distributor car then have someone crank the engine while u hold one of the plug wires with either an old sparkplug, (prefered), or a small screwdriver, nail, etc. inserted into the plug boot & the end held about a 1/8'' away from some metal point on the engine. If when cranked u have a spark arc then move on to the next test. Since the cassettes will usually give u some advanced notice of their pending death, aka, missfires, poor idle, hesitation on acceleration & the like, all throwing a ''check engine'' light lets move on. The fuel pump will just up & die, no notice. On the 4 cyl. if u carefully pull the air tube from the top of the throttle body. Again, not knowing ur year & model exactly u will have to roll with me here. You will either have just a tube or an air box on top of the throttle body. The tube wil either be bolted with two 10mm head bolts or u will have a hose type clamp. If u have the air box, it has a small wire bale clip on the rear edge under the lip of the box. Unclip it, careful not to lose it as it will fly off. Be mindful not to over lift the airbox as it is connected to the Mass Air Meter by a rubber hose that will split or tear if u over do it. Now that u have access to the throttle body u will see the throttle plate, brass, round & closed off. Pour NO MORE than half a shot glass of raw gasoline into the throttle body opening & refit quickly whatever type air inlet u had back into place. You will not need to rebolt the air tube just fit it in place. Try to start the car, if starts & runs for just a few seconds, u have a junk fuel pump. The fuel pump is in the fuel tank & if u have a 900 or a 9-3 model from '94 to '03 the fuel tank has to come out. A reputable shop will just replace the pump itself, not the whole assembly, saving u a couple of Ben Franklins. It is a Walbro pump & while the labor will be the same either way if they care for ur business they will do right by u & just replace the pump. If u have any further questions just ask. Good Luck, Al