Question about 2001 Chevrolet Blazer

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Put a checker on it and got a p03000 random multiple cyl misfire

Put a code reader on and it shows P0300 code witch is randon multiple cylider misfire what is that.and can I fix it without high priced mechanics, their was a time when I could fix any of them.

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  • Anonymous Jan 06, 2009

    I've been having random multiple misfires for the past year or so...i've replaced plugs, wires, o2 sensors, temp sender, thermostat, and ignition coil and the problem still exists...ive got 205,000 miles on it and i cant even remember the check engine light wasnt on...

  • Anonymous Mar 23, 2014

    randon misfires, bank1 o2 high, long term fuel trim -30, cataletic converter egg smell

  • Anonymous Mar 28, 2014

    P03000

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You are getting a misfire and 99% of the time you need a tune up
plugs and wires and clean your throttlebody

Posted on Oct 27, 2008

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ReNissan P0300


a misfire can be mechanical as well as electrical
code p 0300 is random/ multiple misfires detected
low fuel pressure is a probable cause from a problem fuel pressure regulator or problem EVAC system not venting properly causing a vacuum in the tank and starving the pump
erratic could be from valve problems on heating
loose valve seat insert/s, incorrect valve clearance from faulty hydraulic followers, cam shaft lobe failures are all part of the mechanical reason for random /multiple misfires

Oct 01, 2016 | Cars & Trucks

1 Answer

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

1 Answer

I have 01 trooper replaced gas cap now check engine light off, but I have a p0300 code will it pass smog.?.


Many states will not pass a vehicle with a check engine light.

The P03000 code you have has little to do with the gas cap, rather it is a random misfire code. read more about this code and possible fixes in the link below. Good luck!

http://www.obd-codes.com/p0300

Jul 24, 2015 | 2001 Isuzu Trooper

1 Answer

Multiple cylinder misfires cause engine to die out unless gas pedal is pressed. Will not idle


the fuel smell is from unburnt fuel in the cylinders not firing , i'd have to start with reading the OBD codes to help narrow down the component/s at fault but at a guess i'd think the ign coils are at fault but the OBD will pinpoint the issue

Oct 08, 2014 | 2002 Dodge Durango

1 Answer

Random multiple misfire P0300, P0302, P0304 on 2006 Kia Rio


A competent mechanic will check all probable causes associated with these DTC codes.
Code P0300: Random-Multiple misfire detected. Probable causes:
1. Vacuum leaks, damaged hoses, or improper routing
2. Fuel contamination
3. Ignition system - Ignition module, coil, spark plugs and wires
4. Fuel system
Code P0302: Cylinder 2 misfire detected. Probable causes:
1. Control unit software in need of updating
2. Faulty PCM or ECM
3. Faulty fuel injector
4. Ignition system
5. Fuel system
Code 0304: Cylinder 4 misfire detected. Probable causes:
1. Control unit software in need of updating
2. Faulty PCM or ECM
3. Faulty fuel injector
4. Ignition system
5. Fuel system

Be sure the invoice enumerates all of these probable causes as having been checked. Also, some of the replacement parts installed earlier may be faulty.

Jan 19, 2014 | Kia Cars & Trucks

1 Answer

Code p0300 century custom


P0300 is a random multiple misfire. Could need plugs and wires or a new coil pack. Take it to a qualified mechanic and have them test it.

Jul 29, 2013 | Cars & Trucks

2 Answers

What does code P0300 mean for a 2000 volvo engine


P0300 random misfire P0302 misfire cyl 2 P0304 misfire cyl 4.
Check spark plug and wires and coils

Feb 03, 2013 | 2000 Volvo S40

1 Answer

2002 elantra cyl 2 random misfire


Hi there: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.

For example, a P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2; same condition in P0301 - cyl #1, P0303 - cyl #3 and P0304 - cyl #4.

A code P0300 (or 301, 302, 303 or 304) 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 EGR valve / passages
Faulty camshaft position sensor
Defective computer

About your 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.


Hope this helps.

Mar 09, 2012 | Hyundai Motor 2002 Elantra

1 Answer

I have an 2005 ford f250 with the 5.4L. and its showing codes po174, po300, po305, po307 and i alreadt put a new maf in. what should it look at next?


Did you resolve the other codes? p0300 random multiple misfire, p0305 misfire cyl #5, p0307 misfire cyl #7? You could have bad ignition coils or a vacuum leak. Check your coils and check for vacuum leaks at the intake manifold check vacuum hoses. Hope this helps!

May 22, 2011 | 2005 Ford F 250 Super Duty

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