Engine turns over but my Saab 900i s won't start, and fuel not getting into engine, but, I have nearly half a tank, can the crank sensor stop the injectors from sending fuel into engine?

do you have a spark at the plugs ? if so ..main cause is fuel pump connector plug under car by fuel tank . test this bye getting a Friend to turn ignition on but not start whilst you listen under car for fuel pump buzz. if you hear a buzz forget solution 1 if no sound try solution 1. move the plug (4wires in front of fuel tank ) about then try again . if you have a tester and power is passing this point (pump side) then it fuel pump faulty.. solution 2 crank sensor which is on the lower half of the engine block .. hope this helps

Hi, have you checked or replaced the oxygen sensors?

still could have a fault in crank sensor wiring ,,, you need to plug in diagnostic tool when it wont start and see if you have a engine revs reading ,,, also check if fuel is getting to the engine ,,,, that car also has immobiliser so try spare key to see if problem goes away ,,,,,, wont get codes on that age group unless problem happens when driveing

You might have a defective fuel tank pressure sensor!

And what does it do now? Does it crank over and not start, or just no power anywhere? If nothing, no power, recheck your battery connections, grounds, for something jarring loose, maybe a relay in the power distribution center (by your battery) jumped out of its socket. Gotta check around...But if it cranks over, but won't start, you need to review the basics for this condition: needs fuel and spark to run. Are you getting fuel up to the engine? Can you hear the fuel pump buzz on for 2 seconds when you turn key on? That 2 seconds is to pressurize the fuel line. When you start cranking, your pump will come on again, and stay on when engine is running. You can only HEAR the pump when someone turns key to on, and you stand or squat near the tank to listen for it, maybe with tank fill cap removed. If you cant hear the pump your FP relay would be the next place to look for a problem of no power to pump. If pump IS working, then back to engine: check if ignition (spark ) is working. Easiest way: pull spark plug wire, remove plug and put it on the wire you pulled off. Ground the threads of plug on metal of engine, have someone crank it, and watch for spark at that plug. If no spark, check another wire with same plug. No spark means you need to diagnose your ignition starting circuit. Among other things, this involves checking for power to coils, power to the computer (your check engine light DOES come on when key on, right?), a lot of things that a diagnostic flow-chart covers to pinpoint the problem. A good repair manual could walk you through it, if you have a multimeter. If not, you may need someone to help you. If you DO have both spark and fuel up to engine, it's simplified some, but still problematic. Crank position sensor? injector circuit? Good luck, M>, and don't give up.

That sounds like the fuel pump may have lost it's prime. Does it have fuel injection, or a carburetor on the engine? How much gas was in the tank while it was parked on an incline? Have you tried any starting fluid sprayed into the air intake hose, toward the engine? Warning! Don't use much starting fluid! Perhaps a one or two second burst, and have someone crank it immediately after you have stepped back at least 6 feet from the engine. If it fires, then it is definitely a fuel delivery problem! But it won't run long like that unless the fuel pump starts working again ... which is most likely when the engine is cold!

Sounds like a fuel problem. I'd start by changing the fuel filter and running a can of Sea Foam Engine Treatment through the engine. With at least half a tank of gas dump half the Sea Foam in the gas tank and the other half in the crank case.
If this doesn't fix it check the fuel pump, don't just decide to change it or have it changed they can be rather expensive (depending on engine and model).
If the fuel pumps checks good and it's still happening you'll have to start looking into distributor or timing chain problems (usually not intermittent).

Check the fuses/relays for the fuel pump and make sure you are getting gas to the fuel injectors. Also check your fuel filter....if it is clogged it could be stopping the gas from getting to the injectors....good luck

Easiest way, is to disconnect the fuel line from the fuel rail and jumper the fuel pump circuit in the fuse box.

The most common problem is the Direct ignition cassette, followed by the crankshaft position sensor. I am assuming that it cranks, but won't start.