Question about 1996 Dodge Ram 1500 Club Cab

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Misfire Code P0300 - Changed plugs, wires, and cap

Changed plugs, wires, and cap. Check engine light on. Has leaked gas under truck near front floor board area.

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  • Dodge Master
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This code is for a random misfire. It can be from any cylinder. If the plugs etc doesn't correct the problem it may be a bad injector/wiring. Are there any other codes? You will have to try and isolate which cylinder/s are causing the problem and diagnose from there

Posted on Jun 14, 2015

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  • Contributor
  • 5 Answers

Check the crankshaft position sensor it may be sending a varying signal to computer

Posted on Jun 14, 2015

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Posted on Jan 02, 2017

dsacco86
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SOURCE: Engine light comes on - Code shows P0300 and then

OBD II 300 Random/Multiple Cylinder Misfire Detected

When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Posted on Apr 05, 2009

  • 3 Answers

SOURCE: P0171 code and P0301 misfire.

I have a similar problem. I'm replacing the fuel pump and might get an aftermarket coil. The coil on my 5.2L Dakota is right behind the radiator on the front right side of the engine. Stupid spot! I'm surprised it hasn't melted!

Posted on Jun 16, 2009

  • 56 Answers

SOURCE: #8 misfire

With the truck running, spray some water with a spray bottle on the wires and cap, also spray the coil. See if you can make it misfire by doing this. It may help to have a helper in the truck with it idling in gear. You may hav egotten a bad wire or plug, too. I find these run pretty decent with the Champions like they came with.

Posted on Jul 10, 2009

wireguy212
  • 1627 Answers

SOURCE: 1997 dodge dakota 3.9l,change plugs wires dis cap

MAKE SURE YOU HAVE THE WIRES ON THE RIGHT PLUGS.YOU MAY NEED TO GET THE CODES SCANNED TO NARROW DOWN YOUR PROBLEM BUT I THINK IT'S A FIREING ORDER PROBLEM.IF THIS IS NOT THE CASE THEN DO A COMPRESSION TEST ON THE MOTOR TO SEE IF YOU NEED TO GO DEAPER.

Posted on Oct 17, 2009

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Starts up but runs rough, exhaust smells, and when you give it gas it wants to shut off.


How To Fix P0300 random misfire codes in your car ...

? 2:56
https://www.youtube.com/watch?v=OyvdWeyDHf4
Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...

P0300 - OBD-II Trouble Code - RepairPal

repairpal.com > Encyclopedia > OBD II Codes
OBD II Fault Code. OBD II P0300. Fault Code Definition. Random, Multiple MisfireDetected. Symptoms. Check Engine Light flashing; Rough running, hesitation ...

P0300 - Check Engine Light Diagnostic Trouble Code ...

https://www.engine-light-help.com/P0300-check-engine-light.html
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the ...

Random-Misfire Page

www.random-misfire.com/

Jan 24, 2016 | Cars & Trucks

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GMC Sierra Code P0300 Check engine light


GMC Sierra with the code P0300 Q: I have the 2003 GMC Sierra with the code P0300. What could be the problem? A: The code P0300 means "Random Cylinder Misfire". This means that the engine computer has detected that one or more of the cylinders misfire randomly. This code could take some time to diagnose, as there could be a wide range of reasons for the engine cylinders to misfire. Here are just a few examples: bad spark plugs, ignition wires, distributor cap/rotor, bad fuel injectors, bad airflow sensor, broken or weak valve spring, leaking valve, low fuel pressure, manifold gasket leak, clogged catalytic converter, etc. Take your truck to a knowledgeable mechanic and have it check out - driving with the misfiring engine can damage your catalytic converter.
The mechanic can scan the engine computer with the scan tool and see the conditions when the misfire happens and check which cylinders are misfiring. A number of of other things will need to be checked to find the cause (e.g vacuum leaks, exhaust back-pressure, compression, etc.).

on Dec 07, 2009 | GMC Sierra Cars & Trucks

2 Answers

Cad low motor oil cause this misfire codes? po3oo


P0300 Diagnostic Code - Random Misfire Technical Description Random/Multiple Cylinder Misfire Detected What does that mean? Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly. A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why. Symptoms Symptoms may include: the engine may be harder to start the engine may stumble / stumble, and/or hesitate other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: Faulty spark plugs or wires Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector(s) Burned exhaust valve Faulty catalytic converter(s) Stuck/blocked/leaking EGR valve / passages Faulty camshaft position sensor Defective computer Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. If there are symptoms such as 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 wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases 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. It is helpful to have access to a factory service manual and an advanced scan tool to properly diagnose a random misfire DTC. P0300 Diagnostics Video Here is a helpful video that may assist you in learning more, diagnosing, and repairing your P0300 DTC. This video is intended for auto repair professionals but could be helpful to DIYers. It shows use of an advanced OBD-II scan tool during diagnostic steps:

Read more at: http://www.obd-codes.com/p0300
Copyright © OBD-Codes.com Autolite Challenge Series P0300 Engine Misfire Diagnosis

May 14, 2015 | 2005 Cadillac STS

2 Answers

Has p0300 code misfire cyl 2 and 3


If it was just cylinder 2 or 3, the code would be 0302 or 0303. Instead, you have random misfires (probably) such that you should be checking things that affect the whole engine. Vacuum leaks, bad plug wires, bad coil(s) or ignition module are most likely, but even clogged exhaust, O2 sensors and bad battery can cause these problems. Yes, a battery can be good enough to start your car but still be bad enough to affect performance. If I had to guess, I would start by testing the ignition module. Most parts stores can test this if you remove it and carry it to them.

May 04, 2015 | 1998 Chevrolet Blazer

2 Answers

Why the loss of power and po300 code?


HARD TO SAY WITH OUT BEING THERE BUT THIS MIGHT HELP .
Crankshaft sensor Was the trouble with my 99 Chevy truck after replacing many components like coil cap rotor wires and so on .
http://www.obd-codes.com/p0102 Code P0300 Causes and Fixes Code p0300 is a code that is generated when your engine has a misfire that is not related to only one cylinder. Sometimes this code will be set in addition to other codes such as p0301 which means that there is a misfire on cylinder 1 (cylinder 1 is the number one cylinder when looking at the firing order. It is generally the forward most cylinder on the engine.). If these engine codes are present as well the you should diagnose those first as they are probably causing code p0300.
This code will set your check engine light and needs to be fixed as soon as possible. If it is not then you will probably need to replace your catalytic converter as well as the problem that is causing your misfire.
There are many causes for this obd code. Since it is a "random misfire" or "multiple misfire" this means that the misfire is on different cylinders and not just one all the time.
Common Causes
  • Low Fuel Pressure
  • Vacuum Leak
  • EGR system malfunction
  • Internal Engine Problems (such as low compression)
Less Common Causes
  • Faulty Coil
  • Faulty Spark Plugs and/or Wires
  • Camshaft or Crankshaft sensors
  • Ignition module
  • Computer

Jun 12, 2014 | 1998 Chevrolet Tahoe

1 Answer

96 Dodge Ram 1500 5.9l p0300


You've probably got a break/split in your fuel line, and your computer is reading that as a misfire (likely due to insufficient fuel pressure).

Feb 08, 2014 | Cars & Trucks

1 Answer

Check Engine Light


have you ever changed the plugs,wires, rotor, distributor cap?it just may need a tune up. check under the cap for any signs of electrical corrosion or cracks or moisture, when was the last time the engine oil was changed? sludge in a engine will also trigger codes which will give you a check engine light even something as simple as a loose gas cap or a worn gasket on the gas cap will trigger a code

Jan 02, 2012 | Chrysler Sebring Cars & Trucks

2 Answers

06 Dodge 1500 V8 4.7L: Overheating, Engine Light


Hi
Check for plugged exhaust system. If plugged will cause overheating and misfiring of all cylinders.

Apr 09, 2009 | 2006 Dodge Ram 1500

1 Answer

Engine light comes on - Code shows P0300 and then


OBD II 300 Random/Multiple Cylinder Misfire Detected

When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Apr 04, 2009 | 1996 Dodge Ram 1500 Club Cab

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