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you have to know that the fuel pump is power by the fuel pump relay
first when key on pcm prime a ground to the fuel pump relay and then the pcm need to know if engine is turning to stay on . make your test at the relay.
1. Attempt to start the car, let it stall, but DO NOT turn the key off!
Leave it in RUN.
2. Wait 10 minutes or until the Theft System light glows steady instead of
3. Do not turn the key off, but start it immediately.
4. This should reset your Passlock system.
The other issue is that the BCM harness is known to corrode and will cause the passlock to fail and will lead to a no start. Check the BCM under the glove box, the bcm had somehow get's wet and the terminals corrode. Sand
down all the corrosion that you could and put the bcm back into place and
the car should started up fine and worked normally if done right. ONLY DO THIS IF YOUR SECURITY LIGHT STAYS SOLID AND DOES NOT RESET FROM THE ABOVE INSTRUCTIONS.
The factory alarm is not to be tampered with as you can reset it but not disconnect it as it's part of the main fuel injection system. Do you have the right key? Just because it turns and cranks doesn't mean it has the right code. the security light off with the key on ut not cranking? If it stays on you do have a security problem. The system can be reset ( if the battery is good, and hot. Trun the key to crank and letgo the security light will but on or blinking . Leave the key on till the light goes out (around 15 minutes. Once it's out turn the key off then back on and the security light will be back on again. again wait till it goes out turn off then on again till the light goes out. Now turn the key off wait a few seconds trun it on and crank the engine. If it starts then it's reset. Sometimes I've had to do this more than three times to get it to reconize the key as the right one. rember a store cut key won't ever work as it doesnt have the (brain in it the the factory key does. Lets say your wrong, about the security system. The fuel pumps go bad like crazy and its thier season to fail. They fail quicker if you $5 the car alot. (runing on empty) Was the check engine light on as it ran the last time it was running? If so the codes need to be retieved and repaired. A scanner will find the security enabled on too.
the security light will flash and disable the fuel injectors preventing the car from starting, if it thinks that it is being stolen. its easy to fix. set the parking brake to turn off the automatic headlights. next turn the key to the on position and wait ten minutes. the security light should stop flashing. then turn the key off and this will reset the security system. it should start immediatly afterwards.
Sounds like your security system is shutting the car down. You should be able to leave the key on for 15 minutes and it will reset itself. Make sure you are using factory keys, and they are in good condition.