Question about Chevrolet Impala

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Hello there, i have a 2000 impala 3.8 v6 series2 engine and the code p0300 keeps showing up on the code scanner...i replaced the plugs, wires, intake manifold and gasket for it, tubings/vacuum lines checked all sensorson the throttle body, replaced egr gasket, coil packs,fuel filter,fuel pump is still good,and the hose and pcv valve was also good wat else could be the problem?? i replaced the o-rings on injectors but not the injector wasnt checked.. i haven checked because i spent enough cash on this car..can i please have a straight on-point answer to solve this so i can sell it...

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The error code Stands for: random/multiple cylinder misfire detected. sounds like you just forgot to reset the error code once you repaired the issue.... hmmm,

A P0300 OBD 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 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 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.
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Posted on Jan 03, 2011

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I fought this problem for 7 months and finally I found the problem it was a very simple very cheap fix. The fuel supply lines that connect to the fuel rails are a press fit assembly. I push down on the rear one just checking for anything loose when fuel squirted out and dripped, but only by pushing down on the fitting. under the fitting is a plastic seat. The rear fuel rail has a 3/8" seat and the front has a 5/16" seat. auto zone sells the seats in pack of 10 for 5 bucks. Problem solved.

Posted on Jun 26, 2013

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P0300 it means you have multiple missfires if you have a coil pack on this model it could be a bad coil or timing is off can do then same but usually a p0300 or example p0301 is a misfire on number 1 cyl as well p0302 and so on you should of stopped after plugs and wires this usally solves the problem or even the pcv valve now i would go back to the first step code p0300 they have precedures to follow but you do not have to replace the engine like they suggest maybe a simple compression test would show if the motor is sick but i would go back to basics and start new before going in head first

Posted on Jan 03, 2011

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SOURCE: hello there, i have a 2000 impala 3.8 v6 series2

This is a easy fix. You need new coils. The coils have small silicone grommets that loose their ability to shield the high voltage and the coil starts to break down internal. Get you 3 new coils cost about $30.00 each. Buy you some dielectric grease, or you can use brake pad stop squeal grease. Coat the seals real good with the grease before you put it back together and its fixed. Number your wires and or take a picture, before you take it apart. Do not get the wires mixed up and it is a easy fix.

Posted on Jan 03, 2011

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1 Answer

Idling rough


misfire spark plugs coils wires did you wash engine water gets in under the intake to the plugs first if with a scanner check codes p0300 change plugs p0301 or 2 or 3 or 4 its one of the cylinders i would try just changing all the plugs first and start from there

Apr 18, 2014 | 2000 Kia Sportage

1 Answer

What are codes p0401 and p0300 mean on a 2000 isuzu trooper


P0401 is EGR problem
P0300 is a cylinder 3 misfire.
Replace EGR valve and do a full tune-up.

Mar 19, 2014 | 2000 Isuzu Trooper

1 Answer

Code p0316 also p0300 truck has no power


P0300 is a random misfire and P0316 is misfire at start-up.
If you have the V6, I would start by replacing the plugs and all the coils.
This is a little ******* the V6, since you have to remove the intake manifold, and the coils can be expensive. Coils are available on Ebay.
I've replaced all the coils on my 2002 Escape V6 after 100,000 miles. Typical V6 problem.

Generally, the issue could be the following from: http://www.obd-codes.com/p0300

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 EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer

Sep 09, 2011 | 2004 Ford Escape

1 Answer

I have a 2005 chevy impala 3.4l v6. I am getting the code P0300 (multiple misfire).i recently changed the spark plugs/wires/coils and have checked all vacuum lines, but my car is still idling...


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 EGR valve / passages
  • Faulty camshaft position sensor (more than likely your culprit)
  • 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.

May 26, 2011 | 2005 Chevrolet Impala

1 Answer

I am getting codes PO 128, PO 300 and PO 506 on my chevy Impala, 2002, LS 3.8


code P0128 ECT ( electronic coolant temperature ) engine temperature to low ( replace thermostat ).

code P0300 engine miss fire detected ( replace spark plugs and spark plug wires )

code P0506 IAC ( idle air control ) system idle to low ( clean the IAC valve if problem persists replace the IAC valve )

Apr 15, 2011 | 2002 Chevrolet Impala

2 Answers

My 2003 impala check engine light is blinking when i go above 30 miles


Hello and welcome, when the check engine light flashes, this means a engine miss that can cause damage to the cat. converter if you keep driving, you will need to have the system scanned for trouble codes, probably has a code P0300. a engine miss can be caused by spark plugs, plug wires, ignition coils, injectors or even a internal engine problem

Apr 05, 2011 | 2003 Chevrolet Impala

1 Answer

Hello there, i have a 2000 impala 3.8 v6 series2 engine and the code p0300 keeps showing up on the code scanner...i replaced the plugs, wires, intake manifold and gasket for it, tubings/vacuum lines...


This is a easy fix. You need new coils. The coils have small silicone grommets that loose their ability to shield the high voltage and the coil starts to break down internal. Get you 3 new coils cost about $30.00 each. Buy you some dielectric grease, or you can use brake pad stop squeal grease. Coat the seals real good with the grease before you put it back together and its fixed. Number your wires and or take a picture, before you take it apart. Do not get the wires mixed up and it is a easy fix.

Jan 03, 2011 | 2000 Chevrolet Impala

2 Answers

Firing order for plugs and wires....on a v6 3800 2000 impala


For the 2000 Chevrolet Impala 3.8L V6:

Firing Order:
1-6-5-4-3-2

Cylinders:
.....(back).....
|...2...4...6...|
___________
|...1...3...5...|
.....(front)

Ignition Coil Connections:
(back)
o <---6
___
o <---3
o <---2
___
o <---5
o <---4
___
o <---1
(front)

Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

Apr 18, 2010 | 2000 Chevrolet Impala

2 Answers

Chevy impala2002


A P0300 code is a random cylinder misfire code and could be caused by a bad plug, plug wire, or fuel injector. The P0171 is bank one o2 sensor is reading lean w/ both of these combined could mean a vacumm leak.. Hope this helps.

Nov 26, 2008 | 2003 Chevrolet Impala

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