Question about 2002 Dodge Durango
Ok here is the background. My durango shut down on me at a stop light after a few minutes it started back up but only went about 100 feet then died again. I then had it towed to a mechanic and he replace the crank sensor, cam sensor and a fuel injector because it had developed a misfire during the time he had it. None of those fixed the problem so i had the PCM replaced that didnt fix it either during this time the mechanic ran my engine for 2 hours straight and collapsed the rings in #3 cylinder. Once i got the truck back from him i had the engine replaced with a newly remaned 4.7 o milage engine. After that the truck ran great with no misfires or anything for about a week then one morning it started to misfire again but this time on 2 cylinders. I just had the PCM replaced again and now it is misfiring on #6 cylinder instead of 1 and 3. I am at a loss of what it can be has anyone ever had an issue like this???? please help if you know what it is. Thanks.
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Posted on Jan 02, 2017
"P done" means there are no codes stored. If there were codes you would see P and 4 numbers.
Posted on May 27, 2009
SOURCE: Check engine light
A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.
The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner.
Posted on Jul 02, 2009
The PCM is located on the fender well in the back of the engine compartment close to the firewall. It is a gray rectangle about 7" x 5". It is ribbed. It attaches using three screws.
It is also located close to heater core parts of your truck. If your overheating problem is related to the heater core, it may in fact be causing the PCM to everheat, though I've never heard of it happening before.
Posted on Aug 24, 2009
Testimonial: "thanks for the info.."
1st try and search for a vaccum leak, due to the fact that these vehicles have had some bad problems with the length of wires and hoses, if there is a vaccum leak in the vehicle somewhere that will trigger other malfunctions in your vehicle. Using a can of starting fluid or Brake cleaner spray lightly spray around our engine til you hear the motor rev-up and the spot you have sprayed will determine where your vaccum leak will be. And then check under your distributor cap for any moisture be sure to take a rag and wipe and residue off. Also check the firing order on your distributor.
Posted on Oct 28, 2009
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