I hawe a 2002 fird explorer and wont start will crank and hawe gas in system but no sparks on spark plugs

use some starting fluid, spray a little bit in the carburetor then try to start it, it should start,if not check for spark at the spark plug and there is a little valve on the fuel rail it has a black cap on it looks just like a cap on the tires take the cap off and push the pin in and see if gas comes out if you have spark and gas it should start

You need to determine whether or not it is getting fuel and spark. It needs both to start. Remove one plug wire and hold it close to the engine while someone cranks it over. There should be spark from the plug wire. If there is spark, you will have a fuel supply issue. Possible fuel pump/relay/wiring/fuel filter/injectors not working to name a few. If no spark, possible crank sensor/ignition module/wiring.

do you have spark? poss causes are crank sensor on front crank pulley, or a shorted egr sensor(dpfe) or a bad tpsensor . have someone scan for trouble codes

You could see if spark plugs have spark if not ck crank sensor or you got a tank of bad gas.

check the crank positioning sensor, other than that there should be a unit that sends signal to the coils make sure everything is plugged in.

turn your key to the on position and see if you hear the fuel pump kick on, if so and you have gas in the vehicle then you should check to see if you have spark at the plugs. you can remove the sparkplugs one by one and check for spark by grounding out the end of the plug and cranking for just a few seconds. if you dont have spark it will be in either the spark plugs, the plug wires, or the coil packs.

A 2002 model gas engine would have direct spark which means each spark plug has a coil attached to it.
Have you pulled a couple of coils to test for spark ?

No spark or no gas. Are you sure the gas gauge acurrate? When you turn the ignition key from Off to Run, but not all the way to start, listen carefully for the sound of the fuel pump. If you don't hear anything, check the fuse. If the fuse is good the pump may be bad.

Remove a spark plug wire and hold the metal end close to [but not touching!] a metal ground [use a pair of insulated pliers to keep from possibly getting shocked. Have a helper crank the engine. If you see a spark, the ignition is probably ok, although that's not 100% certain, as the timing or dwell angle could still be off.

Good luck!

2 things that you have to check on no starts every time. Spark at spark plug and fuel. Turn key to run position and listen at gas tank for fuel pump to run you should hear a whining noise. This will only happen for 3 to 4 seconds then it will shut off until engine starts. You can turn key off then to run every 3 to 4 to listen for fuel pump. You may hear the relay click off in engine area even if pump does not run. Fuel pump failure is pretty common. If pump is running pull spark plug out or put a spare plug into spark plug wire and have someone crank engine set plug on engine and watch for spark. This will give you a starting point. Hope it helps.

This car has anti-theft system in it. The key is "special" in that it has a chip inside that is programmed to work only with that car. Get a new key, recently? See the dealer for help...accordianman