If no lights are on you may want to focus on your fuel. Add a quality injector cleaner and change the fuel filter
You might need to run it longer to get a code. Could be a misfire caused by many things. Check for vacuum leaks. If you have a timing light check each wire. An O2 sensor, maf sensor could also do it.
SOURCE: 2000 dodge intrepid engine light on, power loss, rough idle
P0304 Cylinder 4 Misfire Detected P0354 Ignition Coil 4 Control Circuit P0204 Injector 4 Control Circuit You need to check injetror wires an coil wires .If good, The new coil my not be good.The Injector my be bad. If good it the ECM Check all fuses.
SOURCE: 99 Dodge Durango Dies When Slowing
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
SOURCE: 1999 Dodge Caravan running rough at idle and lack of acceleration
Here are a few things to check that aren't that exspencive to do. check you'r o2 scener and the map scencer.try tapping on the cadiletice convertor to see if can hear any rattling if there is any rattliling the cadiletice converter could be clogged and will need to be replaced.You can also have the emission control module tested to see if it working properly.
SOURCE: how to replace a PCV valve on my 1997 dodge neon?
Once you have the new PCV valve locate the old one on your engine. It will sit on the middle of one of your valve covers (most likely passenger side) and will have a line that connects to the top of the valve. Simply pull the old one out and put the new one in snapping that line on the new one. Should only take about a minute to do. Hope this helps, let me know if it does.
SOURCE: idle is rough in gear at stop 98 caravan 3.3L
I HAVE A 96 DODGE CARAVAN WITH A 3.8L ENGINE..I HAD SIMILAR PROBLEM AND IT WAS THE UPPER INTAKE PLENUM GASKET HAD PIECE MISSING OUT OF IT..MISSING ON #5 CYLINDER AS WELL..GASKET WAS ONLY ABOUT 10 BUCKS AND I REPLACED IT IN ABOUT 30 MINUTES..TOOK ALL BOLTS OUT OF MANIFOLD AND JUST LIFTED IT UP HIGH ENOUGH TO GET OLD GASKET OUT..MIND YOU..I'M AN EXPERIENCED CHRYSLER TECH AND DO A LOT OF ENGINE WORK..SQUIRT SOME BRAKE CLEANER AROUND UPPER INTAKE AND SEE IF ENGINE SMOOTHES OUT..LET ME KNOW WHAT HAPPENS
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