Cranks, but why doesn't it start?

What all test have you done?

Is the SECURITY light lit on the insturment cluster ? Does the engine spin with key in start position ?

Vehicle Theft Deterrent (VTD) System Check

Attempt to start the vehicle.
NO - The engine cranks and starts.
Refer to Engine Cranks but Does Not Run in Engine Controls.
2
Note the security indicator while attempting to start the vehicle.
The indicator light is ON and OFF after approximately 5 seconds.
• SECURITY Indicator Always On or Flashing, Engine Does Not Crank
• SECURITY Indicator Always On or Flashing, Engine Starts
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.

Engine Cranks But Does Not Run !

Do you know how to check fuel pressure ? Check for spark at the spark plug ? You need to find out what's missing an go from there on the system that's not working . Fixing Car That Cranks But Doesn Start Up Watch a few of these type videos an see what your vehicle is missing .

How long since a tune-up? Any applicable trouble codes? Some dodge vehicles you can get mil codes, not sure about your year? It won't hurt to try, turn key just till dash lites come on, no further, cycle the key on--off, on--off, on. Then the mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes.

Also, when the problem is ongoing have a helper crank it, while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check fuel pressure. If spark everywhere, use a gage and check fuel pressure, not only check for correct fuel pressure check that the pressure will hold for a bit, with everything off.
Sometimes with idle issues, I check the idle air system.

if its not your passlock system then you should get a fuel pump pressure test done on the vehicle

check for air in the system . Bleed out at all bleed screws . crack the injector lines at the injectors and continue cranking until diesel drips from the nut. tighten and continue cranking. Check for fast crank speed and glo-plug operation

*Check for these things:
-Fuel, spark,Crank/cam sensor, temperature sensor.

Good luck

Mai

check for codes first or check fuses. Key may have lost code, try another key if you have one.

Most likely the fuel filter is clogged. They cost around 10-15 dollars. Usually mounted somewhere along the frame rail under the vehicle. Just follow the fuel line and it will lead you to it. Also you will need a special tool to release the interior clips. The plastic tool works fine and is about 15 dollars. You can find everything at Autozone or a similar parts store. Hope this helps you.

the battery indicator light usually comes on after a lose of power. Sounds to me like either bad gas, clogged fuel filter or a bad fuel pump. Easiest way to check this is have someone turn the key while you stand at rear side of vehicle and listen for the whinning noise a functioning fuel pump makes as it pressurizes the system.

P.S you dont have to start vehicle to check pump. only requires turning the key to the on position. Good Luck