This is my first time on the forum..I'm hoping I can find some answers to my issue. My car has been experiencing this "cranking, but not starting" issue for 6 months. I've had the ignition coils replaced, the module, spark plugs, fuel filter and fuel pump ALL REPLACED. Yet the issue still persists. I've noticed on other forums people have complained about the Security light blinking when the key is in the ignition and at the On position. Is there some correlation? Does my starter need to be replaced? Before I take my car in to the mechanic, yet again, I want to make sure I'm understanding the issue or perhaps it'* something I can fix myself?

PLEASE HELP!

Does your battery have enough juice? Could have enough to be turning it but not turning it fast enough to fire, happens all the time on my dad'* Cutlass

Yes..Battery is good..all lights come on. No clicking. Also have plenty of gas (can't tell you how many people have asked me that question!) Soo...not sure what'* going on. I'm going to try the Security Bypass reset I saw on another post and see if that works. I also noticed when the key is in the ON position, not only is my Security Light blinking but my Service Engine Soon light is on..could it be my engine??

Check the amperage on the battery while cranking, have someone turn the key while you hold a meter on it. The lights can come on and still not have enough amps to crank the motor to a start.

scan for codes, and i was going to say check the fuel level but you got that covered. reason i say this is because at work today there was a GA GT with the 3400 that wouldnt start, even after a charge it would just crank. even though the guage said 1/8th of a tank there ended up being nothing. check the fuses/relays for the pump also.

Scan for codes?? I'm not sure what that means...I'm new to all this. I looked at my fuses on both sides of the dash but not sure what I'm looking for.

scan for codes with an OBDII code reader, can usually be used for free at advanced auto parts.
the fuel pump fuse and relay are under the hood in the fuse box towards the windshield from the intake.
see if theres any fuel at the rail by depressing the schrader valve on the passenger side of the rail.

Does your security light blink? I'm pretty sure that if the security system goes off, it won't let you even crank the car.

When you are cranking, does the tach gauge move at all?

i ignored the security light issue because i believe it is supposed to do that with key on or door open, mine does anyway...

Post up the codes you have. That will give us a place to start. Until then we're just guessing. You also need to determine what system is failing. When it wont start check for spark, also check the fuel pressure. That will tell us what system isn't working.