The Check engine light is turning on again on my 2002 Dodge Ram 1500 4.7 L. Checked everything engine wise, replaces coil pack &, but still getting a random misfire. I also flushed out the injectors & tuned up the truck. Could this be a sensor? I'm really worried that it's a design flaw that will cost me lots of money to fix. Also, my mechanic spent all day yesterday trying to determine the problem but everything seems to be working fine.
Country: United StatesMake: DodgeModel: RAM 1500Year: 2002Engine: 4.7 liter
Everything but the Check engine light still comes one. Tuned up the engine, replaced coil pack 8 cleared the 308 misfire, but still receiving a random 300 misfire. My mechanic can't seem to find anything wrong with it. Misfires ocassionally at around 60 to 65 mph. I've also cleaned out the enjectors & removed any carbon from the cylinders. Is this a sensor or a design flaw with 4.7 liters!?
Thanks for your question. Sorry you're having car problems, I will do my best to research this and supply you with an accurate answer ASAP. Random misfire codes are interesting because they include many things we wouldn't even think of such as a CRANK sensor, vacuum leaks at intake manifolds, incorrect MAF readings and low fuel pressure. If you have the freeze frame data fro the code O0300, this help help guide you to the problem. Hope this helps you. Thanks, Ron
Unfortunately, I don't have the frame date from the code O0300. It's back at the mechanic's shop. The only other thing I can think of is to find a more advanced diagnostic machine to trouble shoot the problem and tell me what it is.
You're very right, and if this mechanic uses and understands labs scopes, then we're on the right track. It should be difficult to find at all.
Please accept and rate my answer – I hope you found it to be helpful, and if you have any additional questions about this afterwards, just keep this link and ask me. I’m here to help you. Thanks again, Ron
37 years experience