I've also heard in other cases the problems were faulty fuel injectors. The very first thing to do is to check the condition of your 12v battery. Chevy P0300 Definition P0300 is a general and random misfire code, which means that the code is not going to tell you which cylinder is causing the misfire. Just thought I'd share if anyone is having similar issues. If cleaning it doesn't work, the sensors will probably need changing.
If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. Or do I just hand over the car and wait? If you got a P302 or something similar with the P0300, it may be a good idea to check and see if there is any damage or failure from your ignition components. This means that the air and fuel inside each cylinder must be ignited. One simple thing they suggested was changing the spark plugs. The Spark Plug terminals should have a sandy color and not be blackened with soot, white from an overheating combustion chamber, or greenish from coolant. If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders i. These specifications can be found on a sticker under the hood of the vehicle or obtained from any local part store.
They couldn't do any further diagnostics today, but gave me a list of possibilities. A P0300 diagnostic code indicates a random or multiple misfire. Always test drive the vehicle to see if the P0300 trouble code returns after making any repairs. It stands for: P0300 : Random Multiple Misfire Detected P0300 is certainly a cause for concern, and can be a threat to the drivability of your Chevy. The check engine light came on, I checked the codes got : p0300, p0158, and p0138. Otherwise, check the coils a. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring.
If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. If concern is determined to be intermittent, check out our article on intermittent diagnosis and wiggle test connectors and wiring, attempting to duplicate concern. . Since an engine needs a richer more fuel mixture for a smooth idle, this problem may be more noticeable when the vehicle is idling. I would suggest spark plugs, spark plug wires, distributor cap, and rotor if applicable. Better to be a few mm under than to overfill. The higher octane fuel just prevents pre-ignition of the fuel in the cylinder.
You say the oil is just slightly overfilled now, but we don't know how much oil has already been frothed up and drawn into the intake already. I'd hold off on the high-test fuel, it's not likely to help much of anything. Perhaps you have faulty fuel injectors that are spraying too much fuel into your cylinders than is needed. Like all modern cars the throttle body gets pretty sooty. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. Keep your receipts from the oil change, they can pay for any damages caused by overfilling the oil. The noise is easier to detect at idle when wind noise is not interfering with the engine noise.
If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. If there is a Distributor on the engine, remove the Distributor Cap and Rotor. There are other things it could be but this is the most likely cause of your problem. Our emissions expert has put together the following information about the P0300 code. I've also heard in other cases the problems were faulty fuel injectors. If the spark plug gap is not precise, this will cause a misfire.
I would check with your local auto parts store to see if they check those for free some do and others charge a small fee. Also, there are other related trouble codes that could cause the P0300. A P0300 diagnostic code indicates a random or multiple misfire. If all of the checks above have been attempted and the issue is not yet resolved, it may require that you take the car to your local mechanic or dealer to discuss. Otherwise, check the coils a. I would suggest spark plugs, spark plug wires, distributor cap, and rotor if applicable. Reply I own a 2002 Nissan Pathfinder and the other day it started to take a few seconds to turn over on hot starts and once in a while on cold starts.
A P0300 diagnostic code indicates a random or multiple misfire. In some cases, the catalytic converter has gone bad. If you have P0300 and one of these other codes, the cylinder indicated by the cylinder specific codes would be where to start looking for your problem. Here are the most common problems that will throw the code. It will often be accompanied by codes P0301-P0308.