Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Hello. It's possibly a vacuum leak. Do you have any trouble codes at all?
Ok. Your probably dealing with a vacuum leak. Sometimes it takes quite a while for a code to clear itself. if possible, try clearing them with a scan tool and see what comes back. 0403 is the egr control solenoid. if you want, I can provide you with the diagnostic procedure for those codes tomorrow.
are you able to check the fuel trims? or attach a vacuum gauge and see what the engine vacuum does? would like to determine the cause of that misfire.
you can attach it to any vacuum line on the intake manifold. you can use a T fitting. You can also remove the brake booster vacuum hose and use that vacuum supply, as long as you have a way to reduce it down. you will need the proper adapter for either option. The vacuum gauge comes with a few different adapters. fuel trims can be monitored using a scan tool. high trims will indicate to us that your lean. If the trims normalize when you increase rpm, that will indicate to us that you probably have a vacuum leak.
Your engine is sideways mounted. Cylinders 1 3 and 5 are in the rear and 2 4 and 6 are in the front. Cylinder 1 is the rear cylinder furthest to the passenger side of the van.
If the wires were really bad, you should probably change the cylinder 1 spark plug again. I know you already replaced it but the bad wire may have damaged the new plug. Or, you can swap the plug in cylinder 1 with another cylinder, clear the codes and see if the misfire moved to the cylinder you swapped plugs with.
Great. Let me know the outcome. Once we figure out that misfire, i think our problem will be solved. The bad wire could have very easily damaged the ignition coil as well.
well, that's a good sign! Glad it worked out!