Car will not start 2003 cavalier

What about your ignition module? I can't tell if you just replaced coils or ignition module included? Also, before buying anything, check voltage and ground for ignition module. Pink wire is voltage, black wire is ground.

The crank sensor sends ac signal to ignition module, the module converts signal to dc, something the computer can handle, then sends rpm signal to computer.

Tyhe first thing you shd always do on any car with starting problems is to check the spark on the plugs to localize the problem to either fuel or ignition problem. If u have an old spark plug lying around, remove one spark plug wire and attach it to the plug and lay it against the block. If it fires, when the engine turns, then it will most likely be fuel problem.
If it turns out to be fuel problem, you can prove it by using starting fluid carefully into the breather area.

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Does it have any pressure from the spark plugs?
Take out a spark plug, and a tool that can measure the pressure from the pistons. I myself used my finger, it won't hurt you if there is no pressure, but if that is not the problem, the pressure could hurt your finger.
But do try that or let a mechanic check for the pressure to the spark plugs.

never replace parts till u kno the solution--it cud be a fuel pressure regulator or bad filter------or it may be bad ignition wires or module----get car scanned 1st then test for fuel pressure and spark

What size engine? Sounds like crank sensor or ignition module.

check the fuel pressure at the TBI there will be a little schreader valve that looks like abicycleeinner tubee where you put air in, When you find that get someone to try and start it and while they are doing that push in on the schreader valve and it should spray gas out of it, if itdoesn'tt then it is your fuel pump.

If their is no spark,replace the ignition module at the inside base of the distributor.If you have spark then it could be a plugged fuel filter or a problem with the fuel line inside the Gas tank.Worst case needs a new engine. spray a shot of starting fluid in to see if its getting fuel. if it still doesn't pop over its an ignition problem. first test to see if there is power at the ignition coil. if yes pull a plug and lay it on the block hooked up to its plug wire and have someone crank it while you watch for spark.(put on the new plug wires),if no spark the module is shot. one of the solutions above should do it. Take care and good luck on it.

Theft light is it flashing, if it is that's the problem, get in car turn key to on wait about 10mim or so till light stop's flashing, turn key to off then start car. also check for fuel pressure up on fuel rail, if you have fuel pressure not theft system, also check for spark at spark plug or coil pack's which ever easier to check, if no spark possible bad crankshaft sensor, could be a bad coil pack or ignition module but it would still start but with a bad miss.

u prob need a new radiator or new spark plugs and probly a new car

fuel problem?? check the pump pressure

sounds like a bad alternator try this list too 1 Inspect Battery Damaged or faulty battery and/or connections. 2 Inspect Coil - Ignition Damaged or faulty ignition coil or ignition coil circuit. 3 Inspect Fuel Filter Clogged or dirty fuel filter 4 Inspect Fuel Injector Pressure Regulator Faulty fuel injector pressure regulator or circuit. 5 Inspect Fuel Pump Improperly functioning fuel pump or circuits. 6 Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). 7 Inspect Control Module-Ignition Faulty ignition control module or circuit. 8 Inspect Solenoid Switch Damaged or faulty solenoid switch or solenoid switch circuit. 9 Inspect Starter Damaged, worn, defective, or faulty starter or starter related circuit. 10 Inspect Neutral Safety Switch Damaged or faulty neutral safety swittch or circuit. 11 Inspect Fuse Corroded, burned, or shorted fuse may be interupting power source. 12 Inspect Fusible Link Corroded, burned, or shorted fusible link may be interupting power source. 13 Inspect Battery Cable Corroded, broken or poorly connected battery cable. 14 Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor. 15 Inspect Distributor Cap Loose or cracked distributor cap 16 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. 17 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. 18 Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector. 19 Inspect Ignition Switch Worn, damaged or faulty ignition switch or circuit. 20 Inspect Spark Plug Fouled, damaged or broken spark plug(s). 21 Inspect Belt Incorrectly routed, adjusted(tensioned), missing or worn drive belt(s). 22 Inspect Timing Belt Slipped or broken timing belt. 23 Inspect Timing Set Slipped timing chain or worn timing gear(s). 24 Inspect Fuel Tank Contaminated fuel from rusted or deteriorated fuel tank. 25 Inspect Ignition Timing Incorrectly adjusted engine timing.