On a 2004 dodge durango, 4.7l turns over but won't start. It did it 2weeks ago was told electrical problem n fixed. Did it again 3 days ago and it started without anyone doing anything to it the following day. Now it won't start again. Turns over but no start, what can I check?

Durangos are known for crank sensors to go bad. Make sure that your battery is fully charged so you know that isn't an issue. If you don't have the proper equipment, try this.. Your going to need someone else's help for this. Pull one of the spark plug wires, using a screwdriver, put the tip of the screwdriver into the wire and hold the shaft of the screwdriver about a quarter inch away from a good ground source. Have your assistant turn the key and crank the engine while you check to see if you have spark. If you can, visit your local parts store and ask for a noid light that will fit your vehicle. It's usually about $10-$12. The purpose of the noid light is to check for injector pulse. Disconnect the plug for the injector and connect the noid light in it's place. Once again, crank the engine and check to see if the noid light lights up and pulses. If the crank sensor is bad, you should have no spark and no injector pulse. Replace crank sensor if so. If you have spark, check for fuel and or fuel pressure. Listen for the fuel pump to energize when the key is turned. Also try spraying starting fluid into the throttle body. If it starts, your having fuel issues. I hope these tips help. Good luck.