No spark no FI pulse NO START

Have you checked to make sure the security system isn't preventing it from starting?

If not, the cam and crank sensor needs to correlate in order to have injector pulse and spark, so I would start by probing the cam sensor to check for AC current while cranking if there is current ohm the wires to the ecm, if the ohm reading is less than 1 ohm it sounds like a computer problem

put back old ecm and try spare key. if it does not work and you use a new ecm you need to program your keys to the immobilizer for it to work

Yes, the ECM is the last thing to replace after all other possibilities. No spark could be bad ignition coil, bad Ignition Control Module (controls the coil circuits for spark), bad plug wires, the crank and cam sensors (for ECM to determine spark timing).

Check the ICM -it can be tested at a parts store. If good, check the crank sensor.

Check to see if the cam position sensor or the crank position sensor is misaligned or has a corroded connector plug. The ECM needs to get a firing pulse from all cylinders. If the engine is a dual cam and is not attempting to start, some engines have a timing device (chain) for each bank. If the chain broke on one bank, the cam sensor can not possibly fire because the cam is not turning.

If it where the crank sensor there would be no injector pulse also. If it where the cam sensor you could have unplugged it and see if the car started. I think this one may have a simpler solution. Have you checked for power to the coils? Have you checked the coil fuse or the ECM relay?

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does it produce fire does the gas pressure rise does the crank sensor and cam sensor work

It soundslike your timing belt may have a problem. It may have failed prematurely, thetensioner may have failed, the tensioner pulley or idler pulley may have wornout, or the timing may be incorrectly set. No spark can usually be guaranteed acrank sensor fault, cam sensor fault, or timing fault. If the timing checksout, maybe you got a bad crank sensor or cam sensor, but I am 98% sure it'srelated to timing.

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If you did not replace the CRANK sensor on the back side of the motor this most likely is the problem and a very common one at that.this controls spark and injector pulse,unlike the cam sensor which just shows when #1 cilyder is up.

Have you checked for injection pulse or compression. Will it start if you spray carb cleaner in the intake?

Check the fuse for the injectors, some vehicles have the injectors and coil running on the same circut, at the same time check the fuse for the ignition.